<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/>
<meta http-equiv="X-UA-Compatible" content="IE=9"/>
<meta name="generator" content="Doxygen 1.8.5"/>
<title>Faiss: /data/users/matthijs/github_faiss/faiss/index_io.cpp Source File</title>
<link href="tabs.css" rel="stylesheet" type="text/css"/>
<script type="text/javascript" src="jquery.js"></script>
<script type="text/javascript" src="dynsections.js"></script>
<link href="search/search.css" rel="stylesheet" type="text/css"/>
<script type="text/javascript" src="search/search.js"></script>
<script type="text/javascript">
  $(document).ready(function() { searchBox.OnSelectItem(0); });
</script>
<link href="doxygen.css" rel="stylesheet" type="text/css" />
</head>
<body>
<div id="top"><!-- do not remove this div, it is closed by doxygen! -->
<div id="titlearea">
<table cellspacing="0" cellpadding="0">
 <tbody>
 <tr style="height: 56px;">
  <td style="padding-left: 0.5em;">
   <div id="projectname">Faiss
   </div>
  </td>
 </tr>
 </tbody>
</table>
</div>
<!-- end header part -->
<!-- Generated by Doxygen 1.8.5 -->
<script type="text/javascript">
var searchBox = new SearchBox("searchBox", "search",false,'Search');
</script>
  <div id="navrow1" class="tabs">
    <ul class="tablist">
      <li><a href="index.html"><span>Main&#160;Page</span></a></li>
      <li><a href="namespaces.html"><span>Namespaces</span></a></li>
      <li><a href="annotated.html"><span>Classes</span></a></li>
      <li class="current"><a href="files.html"><span>Files</span></a></li>
      <li>
        <div id="MSearchBox" class="MSearchBoxInactive">
        <span class="left">
          <img id="MSearchSelect" src="search/mag_sel.png"
               onmouseover="return searchBox.OnSearchSelectShow()"
               onmouseout="return searchBox.OnSearchSelectHide()"
               alt=""/>
          <input type="text" id="MSearchField" value="Search" accesskey="S"
               onfocus="searchBox.OnSearchFieldFocus(true)" 
               onblur="searchBox.OnSearchFieldFocus(false)" 
               onkeyup="searchBox.OnSearchFieldChange(event)"/>
          </span><span class="right">
            <a id="MSearchClose" href="javascript:searchBox.CloseResultsWindow()"><img id="MSearchCloseImg" border="0" src="search/close.png" alt=""/></a>
          </span>
        </div>
      </li>
    </ul>
  </div>
  <div id="navrow2" class="tabs2">
    <ul class="tablist">
      <li><a href="files.html"><span>File&#160;List</span></a></li>
    </ul>
  </div>
</div><!-- top -->
<!-- window showing the filter options -->
<div id="MSearchSelectWindow"
     onmouseover="return searchBox.OnSearchSelectShow()"
     onmouseout="return searchBox.OnSearchSelectHide()"
     onkeydown="return searchBox.OnSearchSelectKey(event)">
<a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(0)"><span class="SelectionMark">&#160;</span>All</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(1)"><span class="SelectionMark">&#160;</span>Classes</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(2)"><span class="SelectionMark">&#160;</span>Namespaces</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(3)"><span class="SelectionMark">&#160;</span>Functions</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(4)"><span class="SelectionMark">&#160;</span>Variables</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(5)"><span class="SelectionMark">&#160;</span>Typedefs</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(6)"><span class="SelectionMark">&#160;</span>Enumerations</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(7)"><span class="SelectionMark">&#160;</span>Enumerator</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(8)"><span class="SelectionMark">&#160;</span>Friends</a></div>

<!-- iframe showing the search results (closed by default) -->
<div id="MSearchResultsWindow">
<iframe src="javascript:void(0)" frameborder="0" 
        name="MSearchResults" id="MSearchResults">
</iframe>
</div>

<div class="header">
  <div class="headertitle">
<div class="title">/data/users/matthijs/github_faiss/faiss/index_io.cpp</div>  </div>
</div><!--header-->
<div class="contents">
<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;<span class="comment">/**</span></div>
<div class="line"><a name="l00002"></a><span class="lineno">    2</span>&#160;<span class="comment"> * Copyright (c) 2015-present, Facebook, Inc.</span></div>
<div class="line"><a name="l00003"></a><span class="lineno">    3</span>&#160;<span class="comment"> * All rights reserved.</span></div>
<div class="line"><a name="l00004"></a><span class="lineno">    4</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00005"></a><span class="lineno">    5</span>&#160;<span class="comment"> * This source code is licensed under the BSD+Patents license found in the</span></div>
<div class="line"><a name="l00006"></a><span class="lineno">    6</span>&#160;<span class="comment"> * LICENSE file in the root directory of this source tree.</span></div>
<div class="line"><a name="l00007"></a><span class="lineno">    7</span>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00008"></a><span class="lineno">    8</span>&#160;</div>
<div class="line"><a name="l00009"></a><span class="lineno">    9</span>&#160;<span class="comment">// Copyright 2004-present Facebook. All Rights Reserved.</span></div>
<div class="line"><a name="l00010"></a><span class="lineno">   10</span>&#160;</div>
<div class="line"><a name="l00011"></a><span class="lineno">   11</span>&#160;<span class="preprocessor">#include &quot;index_io.h&quot;</span></div>
<div class="line"><a name="l00012"></a><span class="lineno">   12</span>&#160;</div>
<div class="line"><a name="l00013"></a><span class="lineno">   13</span>&#160;<span class="preprocessor">#include &lt;cstdio&gt;</span></div>
<div class="line"><a name="l00014"></a><span class="lineno">   14</span>&#160;<span class="preprocessor">#include &lt;cstdlib&gt;</span></div>
<div class="line"><a name="l00015"></a><span class="lineno">   15</span>&#160;</div>
<div class="line"><a name="l00016"></a><span class="lineno">   16</span>&#160;<span class="preprocessor">#include &lt;sys/mman.h&gt;</span></div>
<div class="line"><a name="l00017"></a><span class="lineno">   17</span>&#160;<span class="preprocessor">#include &lt;sys/types.h&gt;</span></div>
<div class="line"><a name="l00018"></a><span class="lineno">   18</span>&#160;<span class="preprocessor">#include &lt;sys/stat.h&gt;</span></div>
<div class="line"><a name="l00019"></a><span class="lineno">   19</span>&#160;<span class="preprocessor">#include &lt;unistd.h&gt;</span></div>
<div class="line"><a name="l00020"></a><span class="lineno">   20</span>&#160;</div>
<div class="line"><a name="l00021"></a><span class="lineno">   21</span>&#160;<span class="preprocessor">#include &quot;FaissAssert.h&quot;</span></div>
<div class="line"><a name="l00022"></a><span class="lineno">   22</span>&#160;</div>
<div class="line"><a name="l00023"></a><span class="lineno">   23</span>&#160;<span class="preprocessor">#include &quot;IndexFlat.h&quot;</span></div>
<div class="line"><a name="l00024"></a><span class="lineno">   24</span>&#160;<span class="preprocessor">#include &quot;VectorTransform.h&quot;</span></div>
<div class="line"><a name="l00025"></a><span class="lineno">   25</span>&#160;<span class="preprocessor">#include &quot;IndexLSH.h&quot;</span></div>
<div class="line"><a name="l00026"></a><span class="lineno">   26</span>&#160;<span class="preprocessor">#include &quot;IndexPQ.h&quot;</span></div>
<div class="line"><a name="l00027"></a><span class="lineno">   27</span>&#160;<span class="preprocessor">#include &quot;IndexIVF.h&quot;</span></div>
<div class="line"><a name="l00028"></a><span class="lineno">   28</span>&#160;<span class="preprocessor">#include &quot;IndexIVFPQ.h&quot;</span></div>
<div class="line"><a name="l00029"></a><span class="lineno">   29</span>&#160;<span class="preprocessor">#include &quot;IndexIVFFlat.h&quot;</span></div>
<div class="line"><a name="l00030"></a><span class="lineno">   30</span>&#160;<span class="preprocessor">#include &quot;MetaIndexes.h&quot;</span></div>
<div class="line"><a name="l00031"></a><span class="lineno">   31</span>&#160;<span class="preprocessor">#include &quot;IndexScalarQuantizer.h&quot;</span></div>
<div class="line"><a name="l00032"></a><span class="lineno">   32</span>&#160;<span class="preprocessor">#include &quot;IndexHNSW.h&quot;</span></div>
<div class="line"><a name="l00033"></a><span class="lineno">   33</span>&#160;<span class="preprocessor">#include &quot;OnDiskInvertedLists.h&quot;</span></div>
<div class="line"><a name="l00034"></a><span class="lineno">   34</span>&#160;</div>
<div class="line"><a name="l00035"></a><span class="lineno">   35</span>&#160;</div>
<div class="line"><a name="l00036"></a><span class="lineno">   36</span>&#160;</div>
<div class="line"><a name="l00037"></a><span class="lineno">   37</span>&#160;<span class="comment">/*************************************************************</span></div>
<div class="line"><a name="l00038"></a><span class="lineno">   38</span>&#160;<span class="comment"> * The I/O format is the content of the class. For objects that are</span></div>
<div class="line"><a name="l00039"></a><span class="lineno">   39</span>&#160;<span class="comment"> * inherited, like Index, a 4-character-code (fourcc) indicates which</span></div>
<div class="line"><a name="l00040"></a><span class="lineno">   40</span>&#160;<span class="comment"> * child class this is an instance of.</span></div>
<div class="line"><a name="l00041"></a><span class="lineno">   41</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00042"></a><span class="lineno">   42</span>&#160;<span class="comment"> * In this case, the fields of the parent class are written first,</span></div>
<div class="line"><a name="l00043"></a><span class="lineno">   43</span>&#160;<span class="comment"> * then the ones for the child classes. Note that this requires</span></div>
<div class="line"><a name="l00044"></a><span class="lineno">   44</span>&#160;<span class="comment"> * classes to be serialized to have a constructor without parameters,</span></div>
<div class="line"><a name="l00045"></a><span class="lineno">   45</span>&#160;<span class="comment"> * so that the fields can be filled in later. The default constructor</span></div>
<div class="line"><a name="l00046"></a><span class="lineno">   46</span>&#160;<span class="comment"> * should set reasonable defaults for all fields.</span></div>
<div class="line"><a name="l00047"></a><span class="lineno">   47</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00048"></a><span class="lineno">   48</span>&#160;<span class="comment"> * The fourccs are assigned arbitrarily. When the class changed (added</span></div>
<div class="line"><a name="l00049"></a><span class="lineno">   49</span>&#160;<span class="comment"> * or deprecated fields), the fourcc can be replaced. New code should</span></div>
<div class="line"><a name="l00050"></a><span class="lineno">   50</span>&#160;<span class="comment"> * be able to read the old fourcc and fill in new classes.</span></div>
<div class="line"><a name="l00051"></a><span class="lineno">   51</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00052"></a><span class="lineno">   52</span>&#160;<span class="comment"> * TODO: serialization to strings for use in Python pickle or Torch</span></div>
<div class="line"><a name="l00053"></a><span class="lineno">   53</span>&#160;<span class="comment"> * serialization.</span></div>
<div class="line"><a name="l00054"></a><span class="lineno">   54</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;<span class="comment"> * TODO: in this file, the read functions that encouter errors may</span></div>
<div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160;<span class="comment"> * leak memory.</span></div>
<div class="line"><a name="l00057"></a><span class="lineno">   57</span>&#160;<span class="comment"> **************************************************************/</span></div>
<div class="line"><a name="l00058"></a><span class="lineno">   58</span>&#160;</div>
<div class="line"><a name="l00059"></a><span class="lineno">   59</span>&#160;</div>
<div class="line"><a name="l00060"></a><span class="lineno">   60</span>&#160;</div>
<div class="line"><a name="l00061"></a><span class="lineno">   61</span>&#160;<span class="keyword">namespace </span>faiss {</div>
<div class="line"><a name="l00062"></a><span class="lineno">   62</span>&#160;</div>
<div class="line"><a name="l00063"></a><span class="lineno">   63</span>&#160;<span class="keyword">static</span> uint32_t fourcc (<span class="keyword">const</span> <span class="keywordtype">char</span> sx[4]) {</div>
<div class="line"><a name="l00064"></a><span class="lineno">   64</span>&#160;    <span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *x = (<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span>*)sx;</div>
<div class="line"><a name="l00065"></a><span class="lineno">   65</span>&#160;    <span class="keywordflow">return</span> x[0] | x[1] &lt;&lt; 8 | x[2] &lt;&lt; 16 | x[3] &lt;&lt; 24;</div>
<div class="line"><a name="l00066"></a><span class="lineno">   66</span>&#160;}</div>
<div class="line"><a name="l00067"></a><span class="lineno">   67</span>&#160;</div>
<div class="line"><a name="l00068"></a><span class="lineno">   68</span>&#160;<span class="comment">/*************************************************************</span></div>
<div class="line"><a name="l00069"></a><span class="lineno">   69</span>&#160;<span class="comment"> * I/O macros</span></div>
<div class="line"><a name="l00070"></a><span class="lineno">   70</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00071"></a><span class="lineno">   71</span>&#160;<span class="comment"> * we use macros so that we have a line number to report in</span></div>
<div class="line"><a name="l00072"></a><span class="lineno">   72</span>&#160;<span class="comment"> * abort (). This makes debugging a lot easier.</span></div>
<div class="line"><a name="l00073"></a><span class="lineno">   73</span>&#160;<span class="comment"> **************************************************************/</span></div>
<div class="line"><a name="l00074"></a><span class="lineno">   74</span>&#160;</div>
<div class="line"><a name="l00075"></a><span class="lineno">   75</span>&#160;</div>
<div class="line"><a name="l00076"></a><span class="lineno">   76</span>&#160;<span class="preprocessor">#define WRITEANDCHECK(ptr, n) {                                 \</span></div>
<div class="line"><a name="l00077"></a><span class="lineno">   77</span>&#160;<span class="preprocessor">        size_t ret = fwrite (ptr, sizeof (* (ptr)), n, f);      \</span></div>
<div class="line"><a name="l00078"></a><span class="lineno">   78</span>&#160;<span class="preprocessor">        FAISS_THROW_IF_NOT_MSG (ret == (n), &quot;write error&quot;);     \</span></div>
<div class="line"><a name="l00079"></a><span class="lineno">   79</span>&#160;<span class="preprocessor">    }</span></div>
<div class="line"><a name="l00080"></a><span class="lineno">   80</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00081"></a><span class="lineno">   81</span>&#160;<span class="preprocessor">#define READANDCHECK(ptr, n) {                                  \</span></div>
<div class="line"><a name="l00082"></a><span class="lineno">   82</span>&#160;<span class="preprocessor">        size_t ret = fread (ptr, sizeof (* (ptr)), n, f);       \</span></div>
<div class="line"><a name="l00083"></a><span class="lineno">   83</span>&#160;<span class="preprocessor">        FAISS_THROW_IF_NOT_MSG (ret == (n), &quot;read error&quot;);      \</span></div>
<div class="line"><a name="l00084"></a><span class="lineno">   84</span>&#160;<span class="preprocessor">    }</span></div>
<div class="line"><a name="l00085"></a><span class="lineno">   85</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00086"></a><span class="lineno">   86</span>&#160;<span class="preprocessor">#define WRITE1(x) WRITEANDCHECK(&amp;(x), 1)</span></div>
<div class="line"><a name="l00087"></a><span class="lineno">   87</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#define READ1(x)  READANDCHECK(&amp;(x), 1)</span></div>
<div class="line"><a name="l00088"></a><span class="lineno">   88</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00089"></a><span class="lineno">   89</span>&#160;<span class="preprocessor">#define WRITEVECTOR(vec) {                      \</span></div>
<div class="line"><a name="l00090"></a><span class="lineno">   90</span>&#160;<span class="preprocessor">        size_t size = (vec).size ();            \</span></div>
<div class="line"><a name="l00091"></a><span class="lineno">   91</span>&#160;<span class="preprocessor">        WRITEANDCHECK (&amp;size, 1);               \</span></div>
<div class="line"><a name="l00092"></a><span class="lineno">   92</span>&#160;<span class="preprocessor">        WRITEANDCHECK ((vec).data (), size);    \</span></div>
<div class="line"><a name="l00093"></a><span class="lineno">   93</span>&#160;<span class="preprocessor">    }</span></div>
<div class="line"><a name="l00094"></a><span class="lineno">   94</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00095"></a><span class="lineno">   95</span>&#160;<span class="preprocessor">#define READVECTOR(vec) {                       \</span></div>
<div class="line"><a name="l00096"></a><span class="lineno">   96</span>&#160;<span class="preprocessor">        long size;                            \</span></div>
<div class="line"><a name="l00097"></a><span class="lineno">   97</span>&#160;<span class="preprocessor">        READANDCHECK (&amp;size, 1);                \</span></div>
<div class="line"><a name="l00098"></a><span class="lineno">   98</span>&#160;<span class="preprocessor">        FAISS_THROW_IF_NOT (size &gt;= 0 &amp;&amp; size &lt; (1L &lt;&lt; 40));  \</span></div>
<div class="line"><a name="l00099"></a><span class="lineno">   99</span>&#160;<span class="preprocessor">        (vec).resize (size);                    \</span></div>
<div class="line"><a name="l00100"></a><span class="lineno">  100</span>&#160;<span class="preprocessor">        READANDCHECK ((vec).data (), size);     \</span></div>
<div class="line"><a name="l00101"></a><span class="lineno">  101</span>&#160;<span class="preprocessor">    }</span></div>
<div class="line"><a name="l00102"></a><span class="lineno">  102</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00103"></a><span class="lineno"><a class="line" href="structfaiss_1_1ScopeFileCloser.html">  103</a></span>&#160;<span class="keyword">struct </span><a class="code" href="structfaiss_1_1ScopeFileCloser.html">ScopeFileCloser</a> {</div>
<div class="line"><a name="l00104"></a><span class="lineno">  104</span>&#160;    FILE *f;</div>
<div class="line"><a name="l00105"></a><span class="lineno">  105</span>&#160;    <a class="code" href="structfaiss_1_1ScopeFileCloser.html">ScopeFileCloser</a> (FILE *f): f (f) {}</div>
<div class="line"><a name="l00106"></a><span class="lineno">  106</span>&#160;    ~<a class="code" href="structfaiss_1_1ScopeFileCloser.html">ScopeFileCloser</a> () {fclose (f); }</div>
<div class="line"><a name="l00107"></a><span class="lineno">  107</span>&#160;};</div>
<div class="line"><a name="l00108"></a><span class="lineno">  108</span>&#160;</div>
<div class="line"><a name="l00109"></a><span class="lineno">  109</span>&#160;</div>
<div class="line"><a name="l00110"></a><span class="lineno">  110</span>&#160;</div>
<div class="line"><a name="l00111"></a><span class="lineno">  111</span>&#160;</div>
<div class="line"><a name="l00112"></a><span class="lineno">  112</span>&#160;</div>
<div class="line"><a name="l00113"></a><span class="lineno">  113</span>&#160;<span class="comment">/*************************************************************</span></div>
<div class="line"><a name="l00114"></a><span class="lineno">  114</span>&#160;<span class="comment"> * Write</span></div>
<div class="line"><a name="l00115"></a><span class="lineno">  115</span>&#160;<span class="comment"> **************************************************************/</span></div>
<div class="line"><a name="l00116"></a><span class="lineno">  116</span>&#160;</div>
<div class="line"><a name="l00117"></a><span class="lineno">  117</span>&#160;<span class="keyword">static</span> <span class="keywordtype">void</span> write_index_header (<span class="keyword">const</span> <a class="code" href="structfaiss_1_1Index.html">Index</a> *idx, FILE *f) {</div>
<div class="line"><a name="l00118"></a><span class="lineno">  118</span>&#160;    WRITE1 (idx-&gt;<a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>);</div>
<div class="line"><a name="l00119"></a><span class="lineno">  119</span>&#160;    WRITE1 (idx-&gt;<a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a>);</div>
<div class="line"><a name="l00120"></a><span class="lineno">  120</span>&#160;    <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">Index::idx_t</a> dummy = 1 &lt;&lt; 20;</div>
<div class="line"><a name="l00121"></a><span class="lineno">  121</span>&#160;    WRITE1 (dummy);</div>
<div class="line"><a name="l00122"></a><span class="lineno">  122</span>&#160;    WRITE1 (dummy);</div>
<div class="line"><a name="l00123"></a><span class="lineno">  123</span>&#160;    WRITE1 (idx-&gt;<a class="code" href="structfaiss_1_1Index.html#a6e92732617c4dbe364e7678dd8773a7f">is_trained</a>);</div>
<div class="line"><a name="l00124"></a><span class="lineno">  124</span>&#160;    WRITE1 (idx-&gt;<a class="code" href="structfaiss_1_1Index.html#a8e18f641854b2bde83ecff0a2f9a6f4e">metric_type</a>);</div>
<div class="line"><a name="l00125"></a><span class="lineno">  125</span>&#160;}</div>
<div class="line"><a name="l00126"></a><span class="lineno">  126</span>&#160;</div>
<div class="line"><a name="l00127"></a><span class="lineno">  127</span>&#160;<span class="keywordtype">void</span> write_VectorTransform (<span class="keyword">const</span> VectorTransform *vt, FILE *f) {</div>
<div class="line"><a name="l00128"></a><span class="lineno">  128</span>&#160;    <span class="keywordflow">if</span> (<span class="keyword">const</span> LinearTransform * lt =</div>
<div class="line"><a name="l00129"></a><span class="lineno">  129</span>&#160;           dynamic_cast &lt; const LinearTransform *&gt; (vt)) {</div>
<div class="line"><a name="l00130"></a><span class="lineno">  130</span>&#160;        <span class="keywordflow">if</span> (dynamic_cast&lt;const RandomRotationMatrix *&gt;(lt)) {</div>
<div class="line"><a name="l00131"></a><span class="lineno">  131</span>&#160;            uint32_t h = fourcc (<span class="stringliteral">&quot;rrot&quot;</span>);</div>
<div class="line"><a name="l00132"></a><span class="lineno">  132</span>&#160;            WRITE1 (h);</div>
<div class="line"><a name="l00133"></a><span class="lineno">  133</span>&#160;        } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (<span class="keyword">const</span> PCAMatrix * pca =</div>
<div class="line"><a name="l00134"></a><span class="lineno">  134</span>&#160;                   dynamic_cast&lt;const PCAMatrix *&gt;(lt)) {</div>
<div class="line"><a name="l00135"></a><span class="lineno">  135</span>&#160;            uint32_t h = fourcc (<span class="stringliteral">&quot;PcAm&quot;</span>);</div>
<div class="line"><a name="l00136"></a><span class="lineno">  136</span>&#160;            WRITE1 (h);</div>
<div class="line"><a name="l00137"></a><span class="lineno">  137</span>&#160;            WRITE1 (pca-&gt;eigen_power);</div>
<div class="line"><a name="l00138"></a><span class="lineno">  138</span>&#160;            WRITE1 (pca-&gt;random_rotation);</div>
<div class="line"><a name="l00139"></a><span class="lineno">  139</span>&#160;            WRITE1 (pca-&gt;balanced_bins);</div>
<div class="line"><a name="l00140"></a><span class="lineno">  140</span>&#160;            WRITEVECTOR (pca-&gt;mean);</div>
<div class="line"><a name="l00141"></a><span class="lineno">  141</span>&#160;            WRITEVECTOR (pca-&gt;eigenvalues);</div>
<div class="line"><a name="l00142"></a><span class="lineno">  142</span>&#160;            WRITEVECTOR (pca-&gt;PCAMat);</div>
<div class="line"><a name="l00143"></a><span class="lineno">  143</span>&#160;        } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00144"></a><span class="lineno">  144</span>&#160;            <span class="comment">// generic LinearTransform (includes OPQ)</span></div>
<div class="line"><a name="l00145"></a><span class="lineno">  145</span>&#160;            uint32_t h = fourcc (<span class="stringliteral">&quot;LTra&quot;</span>);</div>
<div class="line"><a name="l00146"></a><span class="lineno">  146</span>&#160;            WRITE1 (h);</div>
<div class="line"><a name="l00147"></a><span class="lineno">  147</span>&#160;        }</div>
<div class="line"><a name="l00148"></a><span class="lineno">  148</span>&#160;        WRITE1 (lt-&gt;have_bias);</div>
<div class="line"><a name="l00149"></a><span class="lineno">  149</span>&#160;        WRITEVECTOR (lt-&gt;A);</div>
<div class="line"><a name="l00150"></a><span class="lineno">  150</span>&#160;        WRITEVECTOR (lt-&gt;b);</div>
<div class="line"><a name="l00151"></a><span class="lineno">  151</span>&#160;    } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (<span class="keyword">const</span> RemapDimensionsTransform *rdt =</div>
<div class="line"><a name="l00152"></a><span class="lineno">  152</span>&#160;               dynamic_cast&lt;const RemapDimensionsTransform *&gt;(vt)) {</div>
<div class="line"><a name="l00153"></a><span class="lineno">  153</span>&#160;        uint32_t h = fourcc (<span class="stringliteral">&quot;RmDT&quot;</span>);</div>
<div class="line"><a name="l00154"></a><span class="lineno">  154</span>&#160;        WRITE1 (h);</div>
<div class="line"><a name="l00155"></a><span class="lineno">  155</span>&#160;        WRITEVECTOR (rdt-&gt;map);</div>
<div class="line"><a name="l00156"></a><span class="lineno">  156</span>&#160;    } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (<span class="keyword">const</span> NormalizationTransform *nt =</div>
<div class="line"><a name="l00157"></a><span class="lineno">  157</span>&#160;               dynamic_cast&lt;const NormalizationTransform *&gt;(vt)) {</div>
<div class="line"><a name="l00158"></a><span class="lineno">  158</span>&#160;        uint32_t h = fourcc (<span class="stringliteral">&quot;VNrm&quot;</span>);</div>
<div class="line"><a name="l00159"></a><span class="lineno">  159</span>&#160;        WRITE1 (h);</div>
<div class="line"><a name="l00160"></a><span class="lineno">  160</span>&#160;        WRITE1 (nt-&gt;norm);</div>
<div class="line"><a name="l00161"></a><span class="lineno">  161</span>&#160;    } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00162"></a><span class="lineno">  162</span>&#160;        FAISS_THROW_MSG (<span class="stringliteral">&quot;cannot serialize this&quot;</span>);</div>
<div class="line"><a name="l00163"></a><span class="lineno">  163</span>&#160;    }</div>
<div class="line"><a name="l00164"></a><span class="lineno">  164</span>&#160;    <span class="comment">// common fields</span></div>
<div class="line"><a name="l00165"></a><span class="lineno">  165</span>&#160;    WRITE1 (vt-&gt;d_in);</div>
<div class="line"><a name="l00166"></a><span class="lineno">  166</span>&#160;    WRITE1 (vt-&gt;d_out);</div>
<div class="line"><a name="l00167"></a><span class="lineno">  167</span>&#160;    WRITE1 (vt-&gt;is_trained);</div>
<div class="line"><a name="l00168"></a><span class="lineno">  168</span>&#160;}</div>
<div class="line"><a name="l00169"></a><span class="lineno">  169</span>&#160;</div>
<div class="line"><a name="l00170"></a><span class="lineno">  170</span>&#160;<span class="keyword">static</span> <span class="keywordtype">void</span> write_ProductQuantizer (<span class="keyword">const</span> ProductQuantizer *pq, FILE *f) {</div>
<div class="line"><a name="l00171"></a><span class="lineno">  171</span>&#160;    WRITE1 (pq-&gt;d);</div>
<div class="line"><a name="l00172"></a><span class="lineno">  172</span>&#160;    WRITE1 (pq-&gt;M);</div>
<div class="line"><a name="l00173"></a><span class="lineno">  173</span>&#160;    WRITE1 (pq-&gt;nbits);</div>
<div class="line"><a name="l00174"></a><span class="lineno">  174</span>&#160;    WRITEVECTOR (pq-&gt;centroids);</div>
<div class="line"><a name="l00175"></a><span class="lineno">  175</span>&#160;}</div>
<div class="line"><a name="l00176"></a><span class="lineno">  176</span>&#160;</div>
<div class="line"><a name="l00177"></a><span class="lineno">  177</span>&#160;<span class="keyword">static</span> <span class="keywordtype">void</span> write_ScalarQuantizer (<span class="keyword">const</span> ScalarQuantizer *ivsc, FILE *f) {</div>
<div class="line"><a name="l00178"></a><span class="lineno">  178</span>&#160;    WRITE1 (ivsc-&gt;qtype);</div>
<div class="line"><a name="l00179"></a><span class="lineno">  179</span>&#160;    WRITE1 (ivsc-&gt;rangestat);</div>
<div class="line"><a name="l00180"></a><span class="lineno">  180</span>&#160;    WRITE1 (ivsc-&gt;rangestat_arg);</div>
<div class="line"><a name="l00181"></a><span class="lineno">  181</span>&#160;    WRITE1 (ivsc-&gt;d);</div>
<div class="line"><a name="l00182"></a><span class="lineno">  182</span>&#160;    WRITE1 (ivsc-&gt;code_size);</div>
<div class="line"><a name="l00183"></a><span class="lineno">  183</span>&#160;    WRITEVECTOR (ivsc-&gt;trained);</div>
<div class="line"><a name="l00184"></a><span class="lineno">  184</span>&#160;}</div>
<div class="line"><a name="l00185"></a><span class="lineno">  185</span>&#160;</div>
<div class="line"><a name="l00186"></a><span class="lineno">  186</span>&#160;<span class="keyword">static</span> <span class="keywordtype">void</span> write_InvertedLists (<span class="keyword">const</span> InvertedLists *ils, FILE *f) {</div>
<div class="line"><a name="l00187"></a><span class="lineno">  187</span>&#160;    <span class="keywordflow">if</span> (ils == <span class="keyword">nullptr</span>) {</div>
<div class="line"><a name="l00188"></a><span class="lineno">  188</span>&#160;        uint32_t h = fourcc (<span class="stringliteral">&quot;il00&quot;</span>);</div>
<div class="line"><a name="l00189"></a><span class="lineno">  189</span>&#160;        WRITE1 (h);</div>
<div class="line"><a name="l00190"></a><span class="lineno">  190</span>&#160;    } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (<span class="keyword">const</span> <span class="keyword">auto</span> &amp; ails =</div>
<div class="line"><a name="l00191"></a><span class="lineno">  191</span>&#160;               dynamic_cast&lt;const ArrayInvertedLists *&gt;(ils)) {</div>
<div class="line"><a name="l00192"></a><span class="lineno">  192</span>&#160;        uint32_t h = fourcc (<span class="stringliteral">&quot;ilar&quot;</span>);</div>
<div class="line"><a name="l00193"></a><span class="lineno">  193</span>&#160;        WRITE1 (h);</div>
<div class="line"><a name="l00194"></a><span class="lineno">  194</span>&#160;        WRITE1 (ails-&gt;nlist);</div>
<div class="line"><a name="l00195"></a><span class="lineno">  195</span>&#160;        WRITE1 (ails-&gt;code_size);</div>
<div class="line"><a name="l00196"></a><span class="lineno">  196</span>&#160;        <span class="comment">// here we store either as a full or a sparse data buffer</span></div>
<div class="line"><a name="l00197"></a><span class="lineno">  197</span>&#160;        <span class="keywordtype">size_t</span> n_non0 = 0;</div>
<div class="line"><a name="l00198"></a><span class="lineno">  198</span>&#160;        <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i &lt; ails-&gt;nlist; i++) {</div>
<div class="line"><a name="l00199"></a><span class="lineno">  199</span>&#160;            <span class="keywordflow">if</span> (ails-&gt;ids[i].size() &gt; 0)</div>
<div class="line"><a name="l00200"></a><span class="lineno">  200</span>&#160;                n_non0++;</div>
<div class="line"><a name="l00201"></a><span class="lineno">  201</span>&#160;        }</div>
<div class="line"><a name="l00202"></a><span class="lineno">  202</span>&#160;        <span class="keywordflow">if</span> (n_non0 &gt; ails-&gt;nlist / 2) {</div>
<div class="line"><a name="l00203"></a><span class="lineno">  203</span>&#160;            uint32_t list_type = fourcc(<span class="stringliteral">&quot;full&quot;</span>);</div>
<div class="line"><a name="l00204"></a><span class="lineno">  204</span>&#160;            WRITE1 (list_type);</div>
<div class="line"><a name="l00205"></a><span class="lineno">  205</span>&#160;            std::vector&lt;size_t&gt; sizes;</div>
<div class="line"><a name="l00206"></a><span class="lineno">  206</span>&#160;            <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i &lt; ails-&gt;nlist; i++) {</div>
<div class="line"><a name="l00207"></a><span class="lineno">  207</span>&#160;                sizes.push_back (ails-&gt;ids[i].size());</div>
<div class="line"><a name="l00208"></a><span class="lineno">  208</span>&#160;            }</div>
<div class="line"><a name="l00209"></a><span class="lineno">  209</span>&#160;            WRITEVECTOR (sizes);</div>
<div class="line"><a name="l00210"></a><span class="lineno">  210</span>&#160;        } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00211"></a><span class="lineno">  211</span>&#160;            <span class="keywordtype">int</span> list_type = fourcc(<span class="stringliteral">&quot;sprs&quot;</span>); <span class="comment">// sparse</span></div>
<div class="line"><a name="l00212"></a><span class="lineno">  212</span>&#160;            WRITE1 (list_type);</div>
<div class="line"><a name="l00213"></a><span class="lineno">  213</span>&#160;            std::vector&lt;size_t&gt; sizes;</div>
<div class="line"><a name="l00214"></a><span class="lineno">  214</span>&#160;            <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i &lt; ails-&gt;nlist; i++) {</div>
<div class="line"><a name="l00215"></a><span class="lineno">  215</span>&#160;                <span class="keywordtype">size_t</span> n = ails-&gt;ids[i].size();</div>
<div class="line"><a name="l00216"></a><span class="lineno">  216</span>&#160;                <span class="keywordflow">if</span> (n &gt; 0) {</div>
<div class="line"><a name="l00217"></a><span class="lineno">  217</span>&#160;                    sizes.push_back (i);</div>
<div class="line"><a name="l00218"></a><span class="lineno">  218</span>&#160;                    sizes.push_back (n);</div>
<div class="line"><a name="l00219"></a><span class="lineno">  219</span>&#160;                }</div>
<div class="line"><a name="l00220"></a><span class="lineno">  220</span>&#160;            }</div>
<div class="line"><a name="l00221"></a><span class="lineno">  221</span>&#160;            WRITEVECTOR (sizes);</div>
<div class="line"><a name="l00222"></a><span class="lineno">  222</span>&#160;        }</div>
<div class="line"><a name="l00223"></a><span class="lineno">  223</span>&#160;        <span class="comment">// make a single contiguous data buffer (useful for mmapping)</span></div>
<div class="line"><a name="l00224"></a><span class="lineno">  224</span>&#160;        <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i &lt; ails-&gt;nlist; i++) {</div>
<div class="line"><a name="l00225"></a><span class="lineno">  225</span>&#160;            <span class="keywordtype">size_t</span> n = ails-&gt;ids[i].size();</div>
<div class="line"><a name="l00226"></a><span class="lineno">  226</span>&#160;            <span class="keywordflow">if</span> (n &gt; 0) {</div>
<div class="line"><a name="l00227"></a><span class="lineno">  227</span>&#160;                WRITEANDCHECK (ails-&gt;codes[i].data(), n * ails-&gt;code_size);</div>
<div class="line"><a name="l00228"></a><span class="lineno">  228</span>&#160;                WRITEANDCHECK (ails-&gt;ids[i].data(), n);</div>
<div class="line"><a name="l00229"></a><span class="lineno">  229</span>&#160;            }</div>
<div class="line"><a name="l00230"></a><span class="lineno">  230</span>&#160;        }</div>
<div class="line"><a name="l00231"></a><span class="lineno">  231</span>&#160;    } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (<span class="keyword">const</span> <span class="keyword">auto</span> &amp; od =</div>
<div class="line"><a name="l00232"></a><span class="lineno">  232</span>&#160;               dynamic_cast&lt;const OnDiskInvertedLists *&gt;(ils)) {</div>
<div class="line"><a name="l00233"></a><span class="lineno">  233</span>&#160;        uint32_t h = fourcc (<span class="stringliteral">&quot;ilod&quot;</span>);</div>
<div class="line"><a name="l00234"></a><span class="lineno">  234</span>&#160;        WRITE1 (h);</div>
<div class="line"><a name="l00235"></a><span class="lineno">  235</span>&#160;        WRITE1 (ils-&gt;nlist);</div>
<div class="line"><a name="l00236"></a><span class="lineno">  236</span>&#160;        WRITE1 (ils-&gt;code_size);</div>
<div class="line"><a name="l00237"></a><span class="lineno">  237</span>&#160;        <span class="comment">// this is a POD object</span></div>
<div class="line"><a name="l00238"></a><span class="lineno">  238</span>&#160;        WRITEVECTOR (od-&gt;lists);</div>
<div class="line"><a name="l00239"></a><span class="lineno">  239</span>&#160;</div>
<div class="line"><a name="l00240"></a><span class="lineno">  240</span>&#160;        {</div>
<div class="line"><a name="l00241"></a><span class="lineno">  241</span>&#160;            std::vector&lt;OnDiskInvertedLists::Slot&gt; v(</div>
<div class="line"><a name="l00242"></a><span class="lineno">  242</span>&#160;                      od-&gt;slots.begin(), od-&gt;slots.end());</div>
<div class="line"><a name="l00243"></a><span class="lineno">  243</span>&#160;            WRITEVECTOR(v);</div>
<div class="line"><a name="l00244"></a><span class="lineno">  244</span>&#160;        }</div>
<div class="line"><a name="l00245"></a><span class="lineno">  245</span>&#160;        {</div>
<div class="line"><a name="l00246"></a><span class="lineno">  246</span>&#160;            std::vector&lt;char&gt; x(od-&gt;filename.begin(), od-&gt;filename.end());</div>
<div class="line"><a name="l00247"></a><span class="lineno">  247</span>&#160;            WRITEVECTOR(x);</div>
<div class="line"><a name="l00248"></a><span class="lineno">  248</span>&#160;        }</div>
<div class="line"><a name="l00249"></a><span class="lineno">  249</span>&#160;        WRITE1(od-&gt;totsize);</div>
<div class="line"><a name="l00250"></a><span class="lineno">  250</span>&#160;</div>
<div class="line"><a name="l00251"></a><span class="lineno">  251</span>&#160;    } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00252"></a><span class="lineno">  252</span>&#160;        FAISS_THROW_MSG (<span class="stringliteral">&quot;write_InvertedLists: unsupported invlist type&quot;</span>);</div>
<div class="line"><a name="l00253"></a><span class="lineno">  253</span>&#160;    }</div>
<div class="line"><a name="l00254"></a><span class="lineno">  254</span>&#160;}</div>
<div class="line"><a name="l00255"></a><span class="lineno">  255</span>&#160;</div>
<div class="line"><a name="l00256"></a><span class="lineno">  256</span>&#160;</div>
<div class="line"><a name="l00257"></a><span class="lineno">  257</span>&#160;<span class="keywordtype">void</span> write_ProductQuantizer (<span class="keyword">const</span> ProductQuantizer*pq, <span class="keyword">const</span> <span class="keywordtype">char</span> *fname) {</div>
<div class="line"><a name="l00258"></a><span class="lineno">  258</span>&#160;    FILE *f = fopen (fname, <span class="stringliteral">&quot;w&quot;</span>);</div>
<div class="line"><a name="l00259"></a><span class="lineno">  259</span>&#160;    FAISS_THROW_IF_NOT_FMT (f, <span class="stringliteral">&quot;cannot open %s for writing&quot;</span>, fname);</div>
<div class="line"><a name="l00260"></a><span class="lineno">  260</span>&#160;    ScopeFileCloser closer(f);</div>
<div class="line"><a name="l00261"></a><span class="lineno">  261</span>&#160;    write_ProductQuantizer (pq, f);</div>
<div class="line"><a name="l00262"></a><span class="lineno">  262</span>&#160;}</div>
<div class="line"><a name="l00263"></a><span class="lineno">  263</span>&#160;</div>
<div class="line"><a name="l00264"></a><span class="lineno">  264</span>&#160;<span class="keyword">static</span> <span class="keywordtype">void</span> write_HNSW (<span class="keyword">const</span> HNSW *hnsw, FILE *f) {</div>
<div class="line"><a name="l00265"></a><span class="lineno">  265</span>&#160;</div>
<div class="line"><a name="l00266"></a><span class="lineno">  266</span>&#160;    WRITEVECTOR (hnsw-&gt;assign_probas);</div>
<div class="line"><a name="l00267"></a><span class="lineno">  267</span>&#160;    WRITEVECTOR (hnsw-&gt;cum_nneighbor_per_level);</div>
<div class="line"><a name="l00268"></a><span class="lineno">  268</span>&#160;    WRITEVECTOR (hnsw-&gt;levels);</div>
<div class="line"><a name="l00269"></a><span class="lineno">  269</span>&#160;    WRITEVECTOR (hnsw-&gt;offsets);</div>
<div class="line"><a name="l00270"></a><span class="lineno">  270</span>&#160;    WRITEVECTOR (hnsw-&gt;neighbors);</div>
<div class="line"><a name="l00271"></a><span class="lineno">  271</span>&#160;</div>
<div class="line"><a name="l00272"></a><span class="lineno">  272</span>&#160;    WRITE1 (hnsw-&gt;entry_point);</div>
<div class="line"><a name="l00273"></a><span class="lineno">  273</span>&#160;    WRITE1 (hnsw-&gt;max_level);</div>
<div class="line"><a name="l00274"></a><span class="lineno">  274</span>&#160;    WRITE1 (hnsw-&gt;efConstruction);</div>
<div class="line"><a name="l00275"></a><span class="lineno">  275</span>&#160;    WRITE1 (hnsw-&gt;efSearch);</div>
<div class="line"><a name="l00276"></a><span class="lineno">  276</span>&#160;    WRITE1 (hnsw-&gt;upper_beam);</div>
<div class="line"><a name="l00277"></a><span class="lineno">  277</span>&#160;</div>
<div class="line"><a name="l00278"></a><span class="lineno">  278</span>&#160;}</div>
<div class="line"><a name="l00279"></a><span class="lineno">  279</span>&#160;</div>
<div class="line"><a name="l00280"></a><span class="lineno">  280</span>&#160;<span class="keyword">static</span> <span class="keywordtype">void</span> write_ivf_header (<span class="keyword">const</span> IndexIVF * ivf, FILE *f) {</div>
<div class="line"><a name="l00281"></a><span class="lineno">  281</span>&#160;    write_index_header (ivf, f);</div>
<div class="line"><a name="l00282"></a><span class="lineno">  282</span>&#160;    WRITE1 (ivf-&gt;nlist);</div>
<div class="line"><a name="l00283"></a><span class="lineno">  283</span>&#160;    WRITE1 (ivf-&gt;nprobe);</div>
<div class="line"><a name="l00284"></a><span class="lineno">  284</span>&#160;    write_index (ivf-&gt;quantizer, f);</div>
<div class="line"><a name="l00285"></a><span class="lineno">  285</span>&#160;    WRITE1 (ivf-&gt;maintain_direct_map);</div>
<div class="line"><a name="l00286"></a><span class="lineno">  286</span>&#160;    WRITEVECTOR (ivf-&gt;direct_map);</div>
<div class="line"><a name="l00287"></a><span class="lineno">  287</span>&#160;}</div>
<div class="line"><a name="l00288"></a><span class="lineno">  288</span>&#160;</div>
<div class="line"><a name="l00289"></a><span class="lineno">  289</span>&#160;<span class="keywordtype">void</span> write_index (<span class="keyword">const</span> Index *idx, FILE *f) {</div>
<div class="line"><a name="l00290"></a><span class="lineno">  290</span>&#160;    <span class="keywordflow">if</span> (<span class="keyword">const</span> IndexFlat * idxf = dynamic_cast&lt;const IndexFlat *&gt; (idx)) {</div>
<div class="line"><a name="l00291"></a><span class="lineno">  291</span>&#160;        uint32_t h = fourcc (</div>
<div class="line"><a name="l00292"></a><span class="lineno">  292</span>&#160;              idxf-&gt;metric_type == METRIC_INNER_PRODUCT ? <span class="stringliteral">&quot;IxFI&quot;</span> :</div>
<div class="line"><a name="l00293"></a><span class="lineno">  293</span>&#160;              idxf-&gt;metric_type == METRIC_L2 ? <span class="stringliteral">&quot;IxF2&quot;</span> : <span class="keyword">nullptr</span>);</div>
<div class="line"><a name="l00294"></a><span class="lineno">  294</span>&#160;        WRITE1 (h);</div>
<div class="line"><a name="l00295"></a><span class="lineno">  295</span>&#160;        write_index_header (idx, f);</div>
<div class="line"><a name="l00296"></a><span class="lineno">  296</span>&#160;        WRITEVECTOR (idxf-&gt;xb);</div>
<div class="line"><a name="l00297"></a><span class="lineno">  297</span>&#160;    } <span class="keywordflow">else</span> <span class="keywordflow">if</span>(<span class="keyword">const</span> IndexLSH * idxl = dynamic_cast&lt;const IndexLSH *&gt; (idx)) {</div>
<div class="line"><a name="l00298"></a><span class="lineno">  298</span>&#160;        uint32_t h = fourcc (<span class="stringliteral">&quot;IxHe&quot;</span>);</div>
<div class="line"><a name="l00299"></a><span class="lineno">  299</span>&#160;        WRITE1 (h);</div>
<div class="line"><a name="l00300"></a><span class="lineno">  300</span>&#160;        write_index_header (idx, f);</div>
<div class="line"><a name="l00301"></a><span class="lineno">  301</span>&#160;        WRITE1 (idxl-&gt;nbits);</div>
<div class="line"><a name="l00302"></a><span class="lineno">  302</span>&#160;        WRITE1 (idxl-&gt;rotate_data);</div>
<div class="line"><a name="l00303"></a><span class="lineno">  303</span>&#160;        WRITE1 (idxl-&gt;train_thresholds);</div>
<div class="line"><a name="l00304"></a><span class="lineno">  304</span>&#160;        WRITEVECTOR (idxl-&gt;thresholds);</div>
<div class="line"><a name="l00305"></a><span class="lineno">  305</span>&#160;        WRITE1 (idxl-&gt;bytes_per_vec);</div>
<div class="line"><a name="l00306"></a><span class="lineno">  306</span>&#160;        write_VectorTransform (&amp;idxl-&gt;rrot, f);</div>
<div class="line"><a name="l00307"></a><span class="lineno">  307</span>&#160;        WRITEVECTOR (idxl-&gt;codes);</div>
<div class="line"><a name="l00308"></a><span class="lineno">  308</span>&#160;    } <span class="keywordflow">else</span> <span class="keywordflow">if</span>(<span class="keyword">const</span> IndexPQ * idxp = dynamic_cast&lt;const IndexPQ *&gt; (idx)) {</div>
<div class="line"><a name="l00309"></a><span class="lineno">  309</span>&#160;        uint32_t h = fourcc (<span class="stringliteral">&quot;IxPq&quot;</span>);</div>
<div class="line"><a name="l00310"></a><span class="lineno">  310</span>&#160;        WRITE1 (h);</div>
<div class="line"><a name="l00311"></a><span class="lineno">  311</span>&#160;        write_index_header (idx, f);</div>
<div class="line"><a name="l00312"></a><span class="lineno">  312</span>&#160;        write_ProductQuantizer (&amp;idxp-&gt;pq, f);</div>
<div class="line"><a name="l00313"></a><span class="lineno">  313</span>&#160;        WRITEVECTOR (idxp-&gt;codes);</div>
<div class="line"><a name="l00314"></a><span class="lineno">  314</span>&#160;        <span class="comment">// search params -- maybe not useful to store?</span></div>
<div class="line"><a name="l00315"></a><span class="lineno">  315</span>&#160;        WRITE1 (idxp-&gt;search_type);</div>
<div class="line"><a name="l00316"></a><span class="lineno">  316</span>&#160;        WRITE1 (idxp-&gt;encode_signs);</div>
<div class="line"><a name="l00317"></a><span class="lineno">  317</span>&#160;        WRITE1 (idxp-&gt;polysemous_ht);</div>
<div class="line"><a name="l00318"></a><span class="lineno">  318</span>&#160;    } <span class="keywordflow">else</span> <span class="keywordflow">if</span>(<span class="keyword">const</span> Index2Layer * idxp =</div>
<div class="line"><a name="l00319"></a><span class="lineno">  319</span>&#160;              dynamic_cast&lt;const Index2Layer *&gt; (idx)) {</div>
<div class="line"><a name="l00320"></a><span class="lineno">  320</span>&#160;        uint32_t h = fourcc (<span class="stringliteral">&quot;Ix2L&quot;</span>);</div>
<div class="line"><a name="l00321"></a><span class="lineno">  321</span>&#160;        WRITE1 (h);</div>
<div class="line"><a name="l00322"></a><span class="lineno">  322</span>&#160;        write_index_header (idx, f);</div>
<div class="line"><a name="l00323"></a><span class="lineno">  323</span>&#160;        write_index (idxp-&gt;q1.quantizer, f);</div>
<div class="line"><a name="l00324"></a><span class="lineno">  324</span>&#160;        WRITE1 (idxp-&gt;q1.nlist);</div>
<div class="line"><a name="l00325"></a><span class="lineno">  325</span>&#160;        WRITE1 (idxp-&gt;q1.quantizer_trains_alone);</div>
<div class="line"><a name="l00326"></a><span class="lineno">  326</span>&#160;        write_ProductQuantizer (&amp;idxp-&gt;pq, f);</div>
<div class="line"><a name="l00327"></a><span class="lineno">  327</span>&#160;        WRITE1 (idxp-&gt;code_size_1);</div>
<div class="line"><a name="l00328"></a><span class="lineno">  328</span>&#160;        WRITE1 (idxp-&gt;code_size_2);</div>
<div class="line"><a name="l00329"></a><span class="lineno">  329</span>&#160;        WRITE1 (idxp-&gt;code_size);</div>
<div class="line"><a name="l00330"></a><span class="lineno">  330</span>&#160;        WRITEVECTOR (idxp-&gt;codes);</div>
<div class="line"><a name="l00331"></a><span class="lineno">  331</span>&#160;    } <span class="keywordflow">else</span> <span class="keywordflow">if</span>(<span class="keyword">const</span> IndexScalarQuantizer * idxs =</div>
<div class="line"><a name="l00332"></a><span class="lineno">  332</span>&#160;              dynamic_cast&lt;const IndexScalarQuantizer *&gt; (idx)) {</div>
<div class="line"><a name="l00333"></a><span class="lineno">  333</span>&#160;        uint32_t h = fourcc (<span class="stringliteral">&quot;IxSQ&quot;</span>);</div>
<div class="line"><a name="l00334"></a><span class="lineno">  334</span>&#160;        WRITE1 (h);</div>
<div class="line"><a name="l00335"></a><span class="lineno">  335</span>&#160;        write_index_header (idx, f);</div>
<div class="line"><a name="l00336"></a><span class="lineno">  336</span>&#160;        write_ScalarQuantizer (&amp;idxs-&gt;sq, f);</div>
<div class="line"><a name="l00337"></a><span class="lineno">  337</span>&#160;        WRITEVECTOR (idxs-&gt;codes);</div>
<div class="line"><a name="l00338"></a><span class="lineno">  338</span>&#160;    } <span class="keywordflow">else</span> <span class="keywordflow">if</span>(<span class="keyword">const</span> IndexIVFFlat * ivfl =</div>
<div class="line"><a name="l00339"></a><span class="lineno">  339</span>&#160;              dynamic_cast&lt;const IndexIVFFlat *&gt; (idx)) {</div>
<div class="line"><a name="l00340"></a><span class="lineno">  340</span>&#160;        uint32_t h = fourcc (<span class="stringliteral">&quot;IwFl&quot;</span>);</div>
<div class="line"><a name="l00341"></a><span class="lineno">  341</span>&#160;        WRITE1 (h);</div>
<div class="line"><a name="l00342"></a><span class="lineno">  342</span>&#160;        write_ivf_header (ivfl, f);</div>
<div class="line"><a name="l00343"></a><span class="lineno">  343</span>&#160;        write_InvertedLists (ivfl-&gt;invlists, f);</div>
<div class="line"><a name="l00344"></a><span class="lineno">  344</span>&#160;    } <span class="keywordflow">else</span> <span class="keywordflow">if</span>(<span class="keyword">const</span> IndexIVFScalarQuantizer * ivsc =</div>
<div class="line"><a name="l00345"></a><span class="lineno">  345</span>&#160;              dynamic_cast&lt;const IndexIVFScalarQuantizer *&gt; (idx)) {</div>
<div class="line"><a name="l00346"></a><span class="lineno">  346</span>&#160;        uint32_t h = fourcc (<span class="stringliteral">&quot;IwSQ&quot;</span>);</div>
<div class="line"><a name="l00347"></a><span class="lineno">  347</span>&#160;        WRITE1 (h);</div>
<div class="line"><a name="l00348"></a><span class="lineno">  348</span>&#160;        write_ivf_header (ivsc, f);</div>
<div class="line"><a name="l00349"></a><span class="lineno">  349</span>&#160;        write_ScalarQuantizer (&amp;ivsc-&gt;sq, f);</div>
<div class="line"><a name="l00350"></a><span class="lineno">  350</span>&#160;        WRITE1 (ivsc-&gt;code_size);</div>
<div class="line"><a name="l00351"></a><span class="lineno">  351</span>&#160;        write_InvertedLists (ivsc-&gt;invlists, f);</div>
<div class="line"><a name="l00352"></a><span class="lineno">  352</span>&#160;    } <span class="keywordflow">else</span> <span class="keywordflow">if</span>(<span class="keyword">const</span> IndexIVFPQ * ivpq =</div>
<div class="line"><a name="l00353"></a><span class="lineno">  353</span>&#160;              dynamic_cast&lt;const IndexIVFPQ *&gt; (idx)) {</div>
<div class="line"><a name="l00354"></a><span class="lineno">  354</span>&#160;        <span class="keyword">const</span> IndexIVFPQR * ivfpqr = <span class="keyword">dynamic_cast&lt;</span><span class="keyword">const </span>IndexIVFPQR *<span class="keyword">&gt;</span> (idx);</div>
<div class="line"><a name="l00355"></a><span class="lineno">  355</span>&#160;</div>
<div class="line"><a name="l00356"></a><span class="lineno">  356</span>&#160;        uint32_t h = fourcc (ivfpqr ? <span class="stringliteral">&quot;IwQR&quot;</span> : <span class="stringliteral">&quot;IwPQ&quot;</span>);</div>
<div class="line"><a name="l00357"></a><span class="lineno">  357</span>&#160;        WRITE1 (h);</div>
<div class="line"><a name="l00358"></a><span class="lineno">  358</span>&#160;        write_ivf_header (ivpq, f);</div>
<div class="line"><a name="l00359"></a><span class="lineno">  359</span>&#160;        WRITE1 (ivpq-&gt;by_residual);</div>
<div class="line"><a name="l00360"></a><span class="lineno">  360</span>&#160;        WRITE1 (ivpq-&gt;code_size);</div>
<div class="line"><a name="l00361"></a><span class="lineno">  361</span>&#160;        write_ProductQuantizer (&amp;ivpq-&gt;pq, f);</div>
<div class="line"><a name="l00362"></a><span class="lineno">  362</span>&#160;        write_InvertedLists (ivpq-&gt;invlists, f);</div>
<div class="line"><a name="l00363"></a><span class="lineno">  363</span>&#160;        <span class="keywordflow">if</span> (ivfpqr) {</div>
<div class="line"><a name="l00364"></a><span class="lineno">  364</span>&#160;            write_ProductQuantizer (&amp;ivfpqr-&gt;refine_pq, f);</div>
<div class="line"><a name="l00365"></a><span class="lineno">  365</span>&#160;            WRITEVECTOR (ivfpqr-&gt;refine_codes);</div>
<div class="line"><a name="l00366"></a><span class="lineno">  366</span>&#160;            WRITE1 (ivfpqr-&gt;k_factor);</div>
<div class="line"><a name="l00367"></a><span class="lineno">  367</span>&#160;        }</div>
<div class="line"><a name="l00368"></a><span class="lineno">  368</span>&#160;</div>
<div class="line"><a name="l00369"></a><span class="lineno">  369</span>&#160;    } <span class="keywordflow">else</span> <span class="keywordflow">if</span>(<span class="keyword">const</span> IndexPreTransform * ixpt =</div>
<div class="line"><a name="l00370"></a><span class="lineno">  370</span>&#160;              dynamic_cast&lt;const IndexPreTransform *&gt; (idx)) {</div>
<div class="line"><a name="l00371"></a><span class="lineno">  371</span>&#160;        uint32_t h = fourcc (<span class="stringliteral">&quot;IxPT&quot;</span>);</div>
<div class="line"><a name="l00372"></a><span class="lineno">  372</span>&#160;        WRITE1 (h);</div>
<div class="line"><a name="l00373"></a><span class="lineno">  373</span>&#160;        write_index_header (ixpt, f);</div>
<div class="line"><a name="l00374"></a><span class="lineno">  374</span>&#160;        <span class="keywordtype">int</span> nt = ixpt-&gt;chain.size();</div>
<div class="line"><a name="l00375"></a><span class="lineno">  375</span>&#160;        WRITE1 (nt);</div>
<div class="line"><a name="l00376"></a><span class="lineno">  376</span>&#160;        <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; nt; i++)</div>
<div class="line"><a name="l00377"></a><span class="lineno">  377</span>&#160;            write_VectorTransform (ixpt-&gt;chain[i], f);</div>
<div class="line"><a name="l00378"></a><span class="lineno">  378</span>&#160;        write_index (ixpt-&gt;index, f);</div>
<div class="line"><a name="l00379"></a><span class="lineno">  379</span>&#160;    } <span class="keywordflow">else</span> <span class="keywordflow">if</span>(<span class="keyword">const</span> MultiIndexQuantizer * imiq =</div>
<div class="line"><a name="l00380"></a><span class="lineno">  380</span>&#160;              dynamic_cast&lt;const MultiIndexQuantizer *&gt; (idx)) {</div>
<div class="line"><a name="l00381"></a><span class="lineno">  381</span>&#160;        uint32_t h = fourcc (<span class="stringliteral">&quot;Imiq&quot;</span>);</div>
<div class="line"><a name="l00382"></a><span class="lineno">  382</span>&#160;        WRITE1 (h);</div>
<div class="line"><a name="l00383"></a><span class="lineno">  383</span>&#160;        write_index_header (imiq, f);</div>
<div class="line"><a name="l00384"></a><span class="lineno">  384</span>&#160;        write_ProductQuantizer (&amp;imiq-&gt;pq, f);</div>
<div class="line"><a name="l00385"></a><span class="lineno">  385</span>&#160;    } <span class="keywordflow">else</span> <span class="keywordflow">if</span>(<span class="keyword">const</span> IndexRefineFlat * idxrf =</div>
<div class="line"><a name="l00386"></a><span class="lineno">  386</span>&#160;              dynamic_cast&lt;const IndexRefineFlat *&gt; (idx)) {</div>
<div class="line"><a name="l00387"></a><span class="lineno">  387</span>&#160;        uint32_t h = fourcc (<span class="stringliteral">&quot;IxRF&quot;</span>);</div>
<div class="line"><a name="l00388"></a><span class="lineno">  388</span>&#160;        WRITE1 (h);</div>
<div class="line"><a name="l00389"></a><span class="lineno">  389</span>&#160;        write_index_header (idxrf, f);</div>
<div class="line"><a name="l00390"></a><span class="lineno">  390</span>&#160;        write_index (idxrf-&gt;base_index, f);</div>
<div class="line"><a name="l00391"></a><span class="lineno">  391</span>&#160;        write_index (&amp;idxrf-&gt;refine_index, f);</div>
<div class="line"><a name="l00392"></a><span class="lineno">  392</span>&#160;        WRITE1 (idxrf-&gt;k_factor);</div>
<div class="line"><a name="l00393"></a><span class="lineno">  393</span>&#160;    } <span class="keywordflow">else</span> <span class="keywordflow">if</span>(<span class="keyword">const</span> IndexIDMap * idxmap =</div>
<div class="line"><a name="l00394"></a><span class="lineno">  394</span>&#160;              dynamic_cast&lt;const IndexIDMap *&gt; (idx)) {</div>
<div class="line"><a name="l00395"></a><span class="lineno">  395</span>&#160;        uint32_t h =</div>
<div class="line"><a name="l00396"></a><span class="lineno">  396</span>&#160;            <span class="keyword">dynamic_cast&lt;</span><span class="keyword">const </span>IndexIDMap2 *<span class="keyword">&gt;</span> (idx) ? fourcc (<span class="stringliteral">&quot;IxM2&quot;</span>) :</div>
<div class="line"><a name="l00397"></a><span class="lineno">  397</span>&#160;            fourcc (<span class="stringliteral">&quot;IxMp&quot;</span>);</div>
<div class="line"><a name="l00398"></a><span class="lineno">  398</span>&#160;        <span class="comment">// no need to store additional info for IndexIDMap2</span></div>
<div class="line"><a name="l00399"></a><span class="lineno">  399</span>&#160;        WRITE1 (h);</div>
<div class="line"><a name="l00400"></a><span class="lineno">  400</span>&#160;        write_index_header (idxmap, f);</div>
<div class="line"><a name="l00401"></a><span class="lineno">  401</span>&#160;        write_index (idxmap-&gt;index, f);</div>
<div class="line"><a name="l00402"></a><span class="lineno">  402</span>&#160;        WRITEVECTOR (idxmap-&gt;id_map);</div>
<div class="line"><a name="l00403"></a><span class="lineno">  403</span>&#160;    } <span class="keywordflow">else</span> <span class="keywordflow">if</span>(<span class="keyword">const</span> IndexHNSW * idxhnsw =</div>
<div class="line"><a name="l00404"></a><span class="lineno">  404</span>&#160;              dynamic_cast&lt;const IndexHNSW *&gt; (idx)) {</div>
<div class="line"><a name="l00405"></a><span class="lineno">  405</span>&#160;        uint32_t h =</div>
<div class="line"><a name="l00406"></a><span class="lineno">  406</span>&#160;            <span class="keyword">dynamic_cast&lt;</span><span class="keyword">const </span>IndexHNSWFlat*<span class="keyword">&gt;</span>(idx)   ? fourcc(<span class="stringliteral">&quot;IHNf&quot;</span>) :</div>
<div class="line"><a name="l00407"></a><span class="lineno">  407</span>&#160;            <span class="keyword">dynamic_cast&lt;</span><span class="keyword">const </span>IndexHNSWPQ*<span class="keyword">&gt;</span>(idx)     ? fourcc(<span class="stringliteral">&quot;IHNp&quot;</span>) :</div>
<div class="line"><a name="l00408"></a><span class="lineno">  408</span>&#160;            <span class="keyword">dynamic_cast&lt;</span><span class="keyword">const </span>IndexHNSWSQ*<span class="keyword">&gt;</span>(idx)     ? fourcc(<span class="stringliteral">&quot;IHNs&quot;</span>) :</div>
<div class="line"><a name="l00409"></a><span class="lineno">  409</span>&#160;            <span class="keyword">dynamic_cast&lt;</span><span class="keyword">const </span>IndexHNSW2Level*<span class="keyword">&gt;</span>(idx) ? fourcc(<span class="stringliteral">&quot;IHN2&quot;</span>) :</div>
<div class="line"><a name="l00410"></a><span class="lineno">  410</span>&#160;            0;</div>
<div class="line"><a name="l00411"></a><span class="lineno">  411</span>&#160;        FAISS_THROW_IF_NOT (h != 0);</div>
<div class="line"><a name="l00412"></a><span class="lineno">  412</span>&#160;        WRITE1 (h);</div>
<div class="line"><a name="l00413"></a><span class="lineno">  413</span>&#160;        write_index_header (idxhnsw, f);</div>
<div class="line"><a name="l00414"></a><span class="lineno">  414</span>&#160;        write_HNSW (&amp;idxhnsw-&gt;hnsw, f);</div>
<div class="line"><a name="l00415"></a><span class="lineno">  415</span>&#160;        write_index (idxhnsw-&gt;storage, f);</div>
<div class="line"><a name="l00416"></a><span class="lineno">  416</span>&#160;    } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00417"></a><span class="lineno">  417</span>&#160;      FAISS_THROW_MSG (<span class="stringliteral">&quot;don&#39;t know how to serialize this type of index&quot;</span>);</div>
<div class="line"><a name="l00418"></a><span class="lineno">  418</span>&#160;    }</div>
<div class="line"><a name="l00419"></a><span class="lineno">  419</span>&#160;}</div>
<div class="line"><a name="l00420"></a><span class="lineno">  420</span>&#160;</div>
<div class="line"><a name="l00421"></a><span class="lineno">  421</span>&#160;<span class="keywordtype">void</span> write_index (<span class="keyword">const</span> Index *idx, <span class="keyword">const</span> <span class="keywordtype">char</span> *fname) {</div>
<div class="line"><a name="l00422"></a><span class="lineno">  422</span>&#160;    FILE *f = fopen (fname, <span class="stringliteral">&quot;w&quot;</span>);</div>
<div class="line"><a name="l00423"></a><span class="lineno">  423</span>&#160;    FAISS_THROW_IF_NOT_FMT (f, <span class="stringliteral">&quot;cannot open %s for writing&quot;</span>, fname);</div>
<div class="line"><a name="l00424"></a><span class="lineno">  424</span>&#160;    ScopeFileCloser closer(f);</div>
<div class="line"><a name="l00425"></a><span class="lineno">  425</span>&#160;    write_index (idx, f);</div>
<div class="line"><a name="l00426"></a><span class="lineno">  426</span>&#160;}</div>
<div class="line"><a name="l00427"></a><span class="lineno">  427</span>&#160;</div>
<div class="line"><a name="l00428"></a><span class="lineno">  428</span>&#160;<span class="keywordtype">void</span> write_VectorTransform (<span class="keyword">const</span> VectorTransform *vt, <span class="keyword">const</span> <span class="keywordtype">char</span> *fname) {</div>
<div class="line"><a name="l00429"></a><span class="lineno">  429</span>&#160;    FILE *f = fopen (fname, <span class="stringliteral">&quot;w&quot;</span>);</div>
<div class="line"><a name="l00430"></a><span class="lineno">  430</span>&#160;    FAISS_THROW_IF_NOT_FMT (f, <span class="stringliteral">&quot;cannot open %s for writing&quot;</span>, fname);</div>
<div class="line"><a name="l00431"></a><span class="lineno">  431</span>&#160;    ScopeFileCloser closer(f);</div>
<div class="line"><a name="l00432"></a><span class="lineno">  432</span>&#160;    write_VectorTransform (vt, f);</div>
<div class="line"><a name="l00433"></a><span class="lineno">  433</span>&#160;}</div>
<div class="line"><a name="l00434"></a><span class="lineno">  434</span>&#160;</div>
<div class="line"><a name="l00435"></a><span class="lineno">  435</span>&#160;<span class="comment">/*************************************************************</span></div>
<div class="line"><a name="l00436"></a><span class="lineno">  436</span>&#160;<span class="comment"> * Read</span></div>
<div class="line"><a name="l00437"></a><span class="lineno">  437</span>&#160;<span class="comment"> **************************************************************/</span></div>
<div class="line"><a name="l00438"></a><span class="lineno">  438</span>&#160;</div>
<div class="line"><a name="l00439"></a><span class="lineno">  439</span>&#160;<span class="keyword">static</span> <span class="keywordtype">void</span> read_index_header (Index *idx, FILE *f) {</div>
<div class="line"><a name="l00440"></a><span class="lineno">  440</span>&#160;    READ1 (idx-&gt;d);</div>
<div class="line"><a name="l00441"></a><span class="lineno">  441</span>&#160;    READ1 (idx-&gt;ntotal);</div>
<div class="line"><a name="l00442"></a><span class="lineno">  442</span>&#160;    <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">Index::idx_t</a> dummy;</div>
<div class="line"><a name="l00443"></a><span class="lineno">  443</span>&#160;    READ1 (dummy);</div>
<div class="line"><a name="l00444"></a><span class="lineno">  444</span>&#160;    READ1 (dummy);</div>
<div class="line"><a name="l00445"></a><span class="lineno">  445</span>&#160;    READ1 (idx-&gt;is_trained);</div>
<div class="line"><a name="l00446"></a><span class="lineno">  446</span>&#160;    READ1 (idx-&gt;metric_type);</div>
<div class="line"><a name="l00447"></a><span class="lineno">  447</span>&#160;    idx-&gt;verbose = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00448"></a><span class="lineno">  448</span>&#160;}</div>
<div class="line"><a name="l00449"></a><span class="lineno">  449</span>&#160;</div>
<div class="line"><a name="l00450"></a><span class="lineno">  450</span>&#160;VectorTransform* read_VectorTransform (FILE *f) {</div>
<div class="line"><a name="l00451"></a><span class="lineno">  451</span>&#160;    uint32_t h;</div>
<div class="line"><a name="l00452"></a><span class="lineno">  452</span>&#160;    READ1 (h);</div>
<div class="line"><a name="l00453"></a><span class="lineno">  453</span>&#160;    VectorTransform *vt = <span class="keyword">nullptr</span>;</div>
<div class="line"><a name="l00454"></a><span class="lineno">  454</span>&#160;</div>
<div class="line"><a name="l00455"></a><span class="lineno">  455</span>&#160;    <span class="keywordflow">if</span> (h == fourcc (<span class="stringliteral">&quot;rrot&quot;</span>) || h == fourcc (<span class="stringliteral">&quot;PCAm&quot;</span>) ||</div>
<div class="line"><a name="l00456"></a><span class="lineno">  456</span>&#160;        h == fourcc (<span class="stringliteral">&quot;LTra&quot;</span>) || h == fourcc (<span class="stringliteral">&quot;PcAm&quot;</span>)) {</div>
<div class="line"><a name="l00457"></a><span class="lineno">  457</span>&#160;        LinearTransform *lt = <span class="keyword">nullptr</span>;</div>
<div class="line"><a name="l00458"></a><span class="lineno">  458</span>&#160;        <span class="keywordflow">if</span> (h == fourcc (<span class="stringliteral">&quot;rrot&quot;</span>)) {</div>
<div class="line"><a name="l00459"></a><span class="lineno">  459</span>&#160;            lt = <span class="keyword">new</span> RandomRotationMatrix ();</div>
<div class="line"><a name="l00460"></a><span class="lineno">  460</span>&#160;        } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (h == fourcc (<span class="stringliteral">&quot;PCAm&quot;</span>) ||</div>
<div class="line"><a name="l00461"></a><span class="lineno">  461</span>&#160;                   h == fourcc (<span class="stringliteral">&quot;PcAm&quot;</span>)) {</div>
<div class="line"><a name="l00462"></a><span class="lineno">  462</span>&#160;            PCAMatrix * pca = <span class="keyword">new</span> PCAMatrix ();</div>
<div class="line"><a name="l00463"></a><span class="lineno">  463</span>&#160;            READ1 (pca-&gt;eigen_power);</div>
<div class="line"><a name="l00464"></a><span class="lineno">  464</span>&#160;            READ1 (pca-&gt;random_rotation);</div>
<div class="line"><a name="l00465"></a><span class="lineno">  465</span>&#160;            <span class="keywordflow">if</span> (h == fourcc (<span class="stringliteral">&quot;PcAm&quot;</span>))</div>
<div class="line"><a name="l00466"></a><span class="lineno">  466</span>&#160;                READ1 (pca-&gt;balanced_bins);</div>
<div class="line"><a name="l00467"></a><span class="lineno">  467</span>&#160;            READVECTOR (pca-&gt;mean);</div>
<div class="line"><a name="l00468"></a><span class="lineno">  468</span>&#160;            READVECTOR (pca-&gt;eigenvalues);</div>
<div class="line"><a name="l00469"></a><span class="lineno">  469</span>&#160;            READVECTOR (pca-&gt;PCAMat);</div>
<div class="line"><a name="l00470"></a><span class="lineno">  470</span>&#160;            lt = pca;</div>
<div class="line"><a name="l00471"></a><span class="lineno">  471</span>&#160;        } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (h == fourcc (<span class="stringliteral">&quot;LTra&quot;</span>)) {</div>
<div class="line"><a name="l00472"></a><span class="lineno">  472</span>&#160;            lt = <span class="keyword">new</span> LinearTransform ();</div>
<div class="line"><a name="l00473"></a><span class="lineno">  473</span>&#160;        }</div>
<div class="line"><a name="l00474"></a><span class="lineno">  474</span>&#160;        READ1 (lt-&gt;have_bias);</div>
<div class="line"><a name="l00475"></a><span class="lineno">  475</span>&#160;        READVECTOR (lt-&gt;A);</div>
<div class="line"><a name="l00476"></a><span class="lineno">  476</span>&#160;        READVECTOR (lt-&gt;b);</div>
<div class="line"><a name="l00477"></a><span class="lineno">  477</span>&#160;        FAISS_THROW_IF_NOT (lt-&gt;A.size() &gt;= lt-&gt;d_in * lt-&gt;d_out);</div>
<div class="line"><a name="l00478"></a><span class="lineno">  478</span>&#160;        FAISS_THROW_IF_NOT (!lt-&gt;have_bias || lt-&gt;b.size() &gt;= lt-&gt;d_out);</div>
<div class="line"><a name="l00479"></a><span class="lineno">  479</span>&#160;        lt-&gt;set_is_orthonormal();</div>
<div class="line"><a name="l00480"></a><span class="lineno">  480</span>&#160;        vt = lt;</div>
<div class="line"><a name="l00481"></a><span class="lineno">  481</span>&#160;    } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (h == fourcc (<span class="stringliteral">&quot;RmDT&quot;</span>)) {</div>
<div class="line"><a name="l00482"></a><span class="lineno">  482</span>&#160;        RemapDimensionsTransform *rdt = <span class="keyword">new</span> RemapDimensionsTransform ();</div>
<div class="line"><a name="l00483"></a><span class="lineno">  483</span>&#160;        READVECTOR (rdt-&gt;map);</div>
<div class="line"><a name="l00484"></a><span class="lineno">  484</span>&#160;        vt = rdt;</div>
<div class="line"><a name="l00485"></a><span class="lineno">  485</span>&#160;    } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (h == fourcc (<span class="stringliteral">&quot;VNrm&quot;</span>)) {</div>
<div class="line"><a name="l00486"></a><span class="lineno">  486</span>&#160;        NormalizationTransform *nt = <span class="keyword">new</span> NormalizationTransform ();</div>
<div class="line"><a name="l00487"></a><span class="lineno">  487</span>&#160;        READ1 (nt-&gt;norm);</div>
<div class="line"><a name="l00488"></a><span class="lineno">  488</span>&#160;        vt = nt;</div>
<div class="line"><a name="l00489"></a><span class="lineno">  489</span>&#160;    } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00490"></a><span class="lineno">  490</span>&#160;        FAISS_THROW_MSG(<span class="stringliteral">&quot;fourcc not recognized&quot;</span>);</div>
<div class="line"><a name="l00491"></a><span class="lineno">  491</span>&#160;    }</div>
<div class="line"><a name="l00492"></a><span class="lineno">  492</span>&#160;    READ1 (vt-&gt;d_in);</div>
<div class="line"><a name="l00493"></a><span class="lineno">  493</span>&#160;    READ1 (vt-&gt;d_out);</div>
<div class="line"><a name="l00494"></a><span class="lineno">  494</span>&#160;    READ1 (vt-&gt;is_trained);</div>
<div class="line"><a name="l00495"></a><span class="lineno">  495</span>&#160;    <span class="keywordflow">return</span> vt;</div>
<div class="line"><a name="l00496"></a><span class="lineno">  496</span>&#160;}</div>
<div class="line"><a name="l00497"></a><span class="lineno">  497</span>&#160;</div>
<div class="line"><a name="l00498"></a><span class="lineno">  498</span>&#160;</div>
<div class="line"><a name="l00499"></a><span class="lineno">  499</span>&#160;<span class="keyword">static</span> <span class="keywordtype">void</span> read_ArrayInvertedLists_sizes (</div>
<div class="line"><a name="l00500"></a><span class="lineno">  500</span>&#160;         FILE *f, std::vector&lt;size_t&gt; &amp; sizes)</div>
<div class="line"><a name="l00501"></a><span class="lineno">  501</span>&#160;{</div>
<div class="line"><a name="l00502"></a><span class="lineno">  502</span>&#160;    <span class="keywordtype">size_t</span> nlist = sizes.size();</div>
<div class="line"><a name="l00503"></a><span class="lineno">  503</span>&#160;    uint32_t list_type;</div>
<div class="line"><a name="l00504"></a><span class="lineno">  504</span>&#160;    READ1(list_type);</div>
<div class="line"><a name="l00505"></a><span class="lineno">  505</span>&#160;    <span class="keywordflow">if</span> (list_type == fourcc(<span class="stringliteral">&quot;full&quot;</span>)) {</div>
<div class="line"><a name="l00506"></a><span class="lineno">  506</span>&#160;        <span class="keywordtype">size_t</span> os = sizes.size();</div>
<div class="line"><a name="l00507"></a><span class="lineno">  507</span>&#160;        READVECTOR (sizes);</div>
<div class="line"><a name="l00508"></a><span class="lineno">  508</span>&#160;        FAISS_THROW_IF_NOT (os == sizes.size());</div>
<div class="line"><a name="l00509"></a><span class="lineno">  509</span>&#160;    } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (list_type == fourcc(<span class="stringliteral">&quot;sprs&quot;</span>)) {</div>
<div class="line"><a name="l00510"></a><span class="lineno">  510</span>&#160;        std::vector&lt;size_t&gt; idsizes;</div>
<div class="line"><a name="l00511"></a><span class="lineno">  511</span>&#160;        READVECTOR (idsizes);</div>
<div class="line"><a name="l00512"></a><span class="lineno">  512</span>&#160;        <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> j = 0; j &lt; idsizes.size(); j += 2) {</div>
<div class="line"><a name="l00513"></a><span class="lineno">  513</span>&#160;            FAISS_THROW_IF_NOT (idsizes[j] &lt; sizes.size());</div>
<div class="line"><a name="l00514"></a><span class="lineno">  514</span>&#160;            sizes[idsizes[j]] = idsizes[j + 1];</div>
<div class="line"><a name="l00515"></a><span class="lineno">  515</span>&#160;        }</div>
<div class="line"><a name="l00516"></a><span class="lineno">  516</span>&#160;    } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00517"></a><span class="lineno">  517</span>&#160;        FAISS_THROW_MSG (<span class="stringliteral">&quot;invalid list_type&quot;</span>);</div>
<div class="line"><a name="l00518"></a><span class="lineno">  518</span>&#160;    }</div>
<div class="line"><a name="l00519"></a><span class="lineno">  519</span>&#160;}</div>
<div class="line"><a name="l00520"></a><span class="lineno">  520</span>&#160;</div>
<div class="line"><a name="l00521"></a><span class="lineno">  521</span>&#160;</div>
<div class="line"><a name="l00522"></a><span class="lineno">  522</span>&#160;InvertedLists *read_InvertedLists (FILE *f, <span class="keywordtype">int</span> io_flags) {</div>
<div class="line"><a name="l00523"></a><span class="lineno">  523</span>&#160;    uint32_t h;</div>
<div class="line"><a name="l00524"></a><span class="lineno">  524</span>&#160;    READ1 (h);</div>
<div class="line"><a name="l00525"></a><span class="lineno">  525</span>&#160;    <span class="keywordflow">if</span> (h == fourcc (<span class="stringliteral">&quot;il00&quot;</span>)) {</div>
<div class="line"><a name="l00526"></a><span class="lineno">  526</span>&#160;        <span class="keywordflow">return</span> <span class="keyword">nullptr</span>;</div>
<div class="line"><a name="l00527"></a><span class="lineno">  527</span>&#160;    } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (h == fourcc (<span class="stringliteral">&quot;ilar&quot;</span>) &amp;&amp; !(io_flags &amp; IO_FLAG_MMAP)) {</div>
<div class="line"><a name="l00528"></a><span class="lineno">  528</span>&#160;        <span class="keyword">auto</span> ails = <span class="keyword">new</span> ArrayInvertedLists (0, 0);</div>
<div class="line"><a name="l00529"></a><span class="lineno">  529</span>&#160;        READ1 (ails-&gt;nlist);</div>
<div class="line"><a name="l00530"></a><span class="lineno">  530</span>&#160;        READ1 (ails-&gt;code_size);</div>
<div class="line"><a name="l00531"></a><span class="lineno">  531</span>&#160;        ails-&gt;ids.resize (ails-&gt;nlist);</div>
<div class="line"><a name="l00532"></a><span class="lineno">  532</span>&#160;        ails-&gt;codes.resize (ails-&gt;nlist);</div>
<div class="line"><a name="l00533"></a><span class="lineno">  533</span>&#160;        std::vector&lt;size_t&gt; sizes (ails-&gt;nlist);</div>
<div class="line"><a name="l00534"></a><span class="lineno">  534</span>&#160;        read_ArrayInvertedLists_sizes (f, sizes);</div>
<div class="line"><a name="l00535"></a><span class="lineno">  535</span>&#160;        <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i &lt; ails-&gt;nlist; i++) {</div>
<div class="line"><a name="l00536"></a><span class="lineno">  536</span>&#160;            ails-&gt;ids[i].resize (sizes[i]);</div>
<div class="line"><a name="l00537"></a><span class="lineno">  537</span>&#160;            ails-&gt;codes[i].resize (sizes[i] * ails-&gt;code_size);</div>
<div class="line"><a name="l00538"></a><span class="lineno">  538</span>&#160;        }</div>
<div class="line"><a name="l00539"></a><span class="lineno">  539</span>&#160;        <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i &lt; ails-&gt;nlist; i++) {</div>
<div class="line"><a name="l00540"></a><span class="lineno">  540</span>&#160;            <span class="keywordtype">size_t</span> n = ails-&gt;ids[i].size();</div>
<div class="line"><a name="l00541"></a><span class="lineno">  541</span>&#160;            <span class="keywordflow">if</span> (n &gt; 0) {</div>
<div class="line"><a name="l00542"></a><span class="lineno">  542</span>&#160;                READANDCHECK (ails-&gt;codes[i].data(), n * ails-&gt;code_size);</div>
<div class="line"><a name="l00543"></a><span class="lineno">  543</span>&#160;                READANDCHECK (ails-&gt;ids[i].data(), n);</div>
<div class="line"><a name="l00544"></a><span class="lineno">  544</span>&#160;            }</div>
<div class="line"><a name="l00545"></a><span class="lineno">  545</span>&#160;        }</div>
<div class="line"><a name="l00546"></a><span class="lineno">  546</span>&#160;        <span class="keywordflow">return</span> ails;</div>
<div class="line"><a name="l00547"></a><span class="lineno">  547</span>&#160;    } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (h == fourcc (<span class="stringliteral">&quot;ilar&quot;</span>) &amp;&amp; (io_flags &amp; IO_FLAG_MMAP)) {</div>
<div class="line"><a name="l00548"></a><span class="lineno">  548</span>&#160;        <span class="keyword">auto</span> ails = <span class="keyword">new</span> OnDiskInvertedLists ();</div>
<div class="line"><a name="l00549"></a><span class="lineno">  549</span>&#160;        READ1 (ails-&gt;nlist);</div>
<div class="line"><a name="l00550"></a><span class="lineno">  550</span>&#160;        READ1 (ails-&gt;code_size);</div>
<div class="line"><a name="l00551"></a><span class="lineno">  551</span>&#160;        ails-&gt;read_only = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00552"></a><span class="lineno">  552</span>&#160;        ails-&gt;lists.resize (ails-&gt;nlist);</div>
<div class="line"><a name="l00553"></a><span class="lineno">  553</span>&#160;        std::vector&lt;size_t&gt; sizes (ails-&gt;nlist);</div>
<div class="line"><a name="l00554"></a><span class="lineno">  554</span>&#160;        read_ArrayInvertedLists_sizes (f, sizes);</div>
<div class="line"><a name="l00555"></a><span class="lineno">  555</span>&#160;        <span class="keywordtype">size_t</span> o0 = ftell (f), o = o0;</div>
<div class="line"><a name="l00556"></a><span class="lineno">  556</span>&#160;        { <span class="comment">// do the mmap</span></div>
<div class="line"><a name="l00557"></a><span class="lineno">  557</span>&#160;            <span class="keyword">struct </span>stat buf;</div>
<div class="line"><a name="l00558"></a><span class="lineno">  558</span>&#160;            <span class="keywordtype">int</span> ret = fstat (fileno(f), &amp;buf);</div>
<div class="line"><a name="l00559"></a><span class="lineno">  559</span>&#160;            FAISS_THROW_IF_NOT_FMT (ret == 0,</div>
<div class="line"><a name="l00560"></a><span class="lineno">  560</span>&#160;                                    <span class="stringliteral">&quot;fstat failed: %s&quot;</span>, strerror(errno));</div>
<div class="line"><a name="l00561"></a><span class="lineno">  561</span>&#160;            ails-&gt;totsize = buf.st_size;</div>
<div class="line"><a name="l00562"></a><span class="lineno">  562</span>&#160;            ails-&gt;ptr = (uint8_t*)mmap (<span class="keyword">nullptr</span>, ails-&gt;totsize,</div>
<div class="line"><a name="l00563"></a><span class="lineno">  563</span>&#160;                                        PROT_READ, MAP_SHARED,</div>
<div class="line"><a name="l00564"></a><span class="lineno">  564</span>&#160;                                        fileno (f), 0);</div>
<div class="line"><a name="l00565"></a><span class="lineno">  565</span>&#160;            FAISS_THROW_IF_NOT_FMT (ails-&gt;ptr != MAP_FAILED,</div>
<div class="line"><a name="l00566"></a><span class="lineno">  566</span>&#160;                            <span class="stringliteral">&quot;could not mmap: %s&quot;</span>,</div>
<div class="line"><a name="l00567"></a><span class="lineno">  567</span>&#160;                            strerror(errno));</div>
<div class="line"><a name="l00568"></a><span class="lineno">  568</span>&#160;        }</div>
<div class="line"><a name="l00569"></a><span class="lineno">  569</span>&#160;        <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i &lt; ails-&gt;nlist; i++) {</div>
<div class="line"><a name="l00570"></a><span class="lineno">  570</span>&#160;            OnDiskInvertedLists::List &amp; l = ails-&gt;lists[i];</div>
<div class="line"><a name="l00571"></a><span class="lineno">  571</span>&#160;            l.size = l.capacity = sizes[i];</div>
<div class="line"><a name="l00572"></a><span class="lineno">  572</span>&#160;            l.offset = o;</div>
<div class="line"><a name="l00573"></a><span class="lineno">  573</span>&#160;            o += l.size * (<span class="keyword">sizeof</span>(OnDiskInvertedLists::idx_t) +</div>
<div class="line"><a name="l00574"></a><span class="lineno">  574</span>&#160;                           ails-&gt;code_size);</div>
<div class="line"><a name="l00575"></a><span class="lineno">  575</span>&#160;        }</div>
<div class="line"><a name="l00576"></a><span class="lineno">  576</span>&#160;        <span class="comment">// resume normal reading of file</span></div>
<div class="line"><a name="l00577"></a><span class="lineno">  577</span>&#160;        fseek (f, o, SEEK_SET);</div>
<div class="line"><a name="l00578"></a><span class="lineno">  578</span>&#160;        <span class="keywordflow">return</span> ails;</div>
<div class="line"><a name="l00579"></a><span class="lineno">  579</span>&#160;    } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (h == fourcc (<span class="stringliteral">&quot;ilod&quot;</span>)) {</div>
<div class="line"><a name="l00580"></a><span class="lineno">  580</span>&#160;        OnDiskInvertedLists *od = <span class="keyword">new</span> OnDiskInvertedLists();</div>
<div class="line"><a name="l00581"></a><span class="lineno">  581</span>&#160;        od-&gt;read_only = io_flags &amp; IO_FLAG_READ_ONLY;</div>
<div class="line"><a name="l00582"></a><span class="lineno">  582</span>&#160;        READ1 (od-&gt;nlist);</div>
<div class="line"><a name="l00583"></a><span class="lineno">  583</span>&#160;        READ1 (od-&gt;code_size);</div>
<div class="line"><a name="l00584"></a><span class="lineno">  584</span>&#160;        <span class="comment">// this is a POD object</span></div>
<div class="line"><a name="l00585"></a><span class="lineno">  585</span>&#160;        READVECTOR (od-&gt;lists);</div>
<div class="line"><a name="l00586"></a><span class="lineno">  586</span>&#160;        {</div>
<div class="line"><a name="l00587"></a><span class="lineno">  587</span>&#160;            std::vector&lt;OnDiskInvertedLists::Slot&gt; v;</div>
<div class="line"><a name="l00588"></a><span class="lineno">  588</span>&#160;            READVECTOR(v);</div>
<div class="line"><a name="l00589"></a><span class="lineno">  589</span>&#160;            od-&gt;slots.assign(v.begin(), v.end());</div>
<div class="line"><a name="l00590"></a><span class="lineno">  590</span>&#160;        }</div>
<div class="line"><a name="l00591"></a><span class="lineno">  591</span>&#160;        {</div>
<div class="line"><a name="l00592"></a><span class="lineno">  592</span>&#160;            std::vector&lt;char&gt; x;</div>
<div class="line"><a name="l00593"></a><span class="lineno">  593</span>&#160;            READVECTOR(x);</div>
<div class="line"><a name="l00594"></a><span class="lineno">  594</span>&#160;            od-&gt;filename.assign(x.begin(), x.end());</div>
<div class="line"><a name="l00595"></a><span class="lineno">  595</span>&#160;        }</div>
<div class="line"><a name="l00596"></a><span class="lineno">  596</span>&#160;        READ1(od-&gt;totsize);</div>
<div class="line"><a name="l00597"></a><span class="lineno">  597</span>&#160;        od-&gt;do_mmap();</div>
<div class="line"><a name="l00598"></a><span class="lineno">  598</span>&#160;        <span class="keywordflow">return</span> od;</div>
<div class="line"><a name="l00599"></a><span class="lineno">  599</span>&#160;    } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00600"></a><span class="lineno">  600</span>&#160;        FAISS_THROW_MSG (<span class="stringliteral">&quot;read_InvertedLists: unsupported invlist type&quot;</span>);</div>
<div class="line"><a name="l00601"></a><span class="lineno">  601</span>&#160;    }</div>
<div class="line"><a name="l00602"></a><span class="lineno">  602</span>&#160;}</div>
<div class="line"><a name="l00603"></a><span class="lineno">  603</span>&#160;</div>
<div class="line"><a name="l00604"></a><span class="lineno">  604</span>&#160;<span class="keyword">static</span> <span class="keywordtype">void</span> read_InvertedLists (IndexIVF *ivf, FILE *f, <span class="keywordtype">int</span> io_flags) {</div>
<div class="line"><a name="l00605"></a><span class="lineno">  605</span>&#160;    InvertedLists *ils = read_InvertedLists (f, io_flags);</div>
<div class="line"><a name="l00606"></a><span class="lineno">  606</span>&#160;    FAISS_THROW_IF_NOT (ils-&gt;nlist == ivf-&gt;nlist &amp;&amp;</div>
<div class="line"><a name="l00607"></a><span class="lineno">  607</span>&#160;                        ils-&gt;code_size == ivf-&gt;code_size);</div>
<div class="line"><a name="l00608"></a><span class="lineno">  608</span>&#160;    ivf-&gt;invlists = ils;</div>
<div class="line"><a name="l00609"></a><span class="lineno">  609</span>&#160;    ivf-&gt;own_invlists = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00610"></a><span class="lineno">  610</span>&#160;}</div>
<div class="line"><a name="l00611"></a><span class="lineno">  611</span>&#160;</div>
<div class="line"><a name="l00612"></a><span class="lineno">  612</span>&#160;</div>
<div class="line"><a name="l00613"></a><span class="lineno">  613</span>&#160;<span class="keyword">static</span> <span class="keywordtype">void</span> read_ProductQuantizer (ProductQuantizer *pq, FILE *f) {</div>
<div class="line"><a name="l00614"></a><span class="lineno">  614</span>&#160;    READ1 (pq-&gt;d);</div>
<div class="line"><a name="l00615"></a><span class="lineno">  615</span>&#160;    READ1 (pq-&gt;M);</div>
<div class="line"><a name="l00616"></a><span class="lineno">  616</span>&#160;    READ1 (pq-&gt;nbits);</div>
<div class="line"><a name="l00617"></a><span class="lineno">  617</span>&#160;    pq-&gt;set_derived_values ();</div>
<div class="line"><a name="l00618"></a><span class="lineno">  618</span>&#160;    READVECTOR (pq-&gt;centroids);</div>
<div class="line"><a name="l00619"></a><span class="lineno">  619</span>&#160;}</div>
<div class="line"><a name="l00620"></a><span class="lineno">  620</span>&#160;</div>
<div class="line"><a name="l00621"></a><span class="lineno">  621</span>&#160;<span class="keyword">static</span> <span class="keywordtype">void</span> read_ScalarQuantizer (ScalarQuantizer *ivsc, FILE *f) {</div>
<div class="line"><a name="l00622"></a><span class="lineno">  622</span>&#160;    READ1 (ivsc-&gt;qtype);</div>
<div class="line"><a name="l00623"></a><span class="lineno">  623</span>&#160;    READ1 (ivsc-&gt;rangestat);</div>
<div class="line"><a name="l00624"></a><span class="lineno">  624</span>&#160;    READ1 (ivsc-&gt;rangestat_arg);</div>
<div class="line"><a name="l00625"></a><span class="lineno">  625</span>&#160;    READ1 (ivsc-&gt;d);</div>
<div class="line"><a name="l00626"></a><span class="lineno">  626</span>&#160;    READ1 (ivsc-&gt;code_size);</div>
<div class="line"><a name="l00627"></a><span class="lineno">  627</span>&#160;    READVECTOR (ivsc-&gt;trained);</div>
<div class="line"><a name="l00628"></a><span class="lineno">  628</span>&#160;}</div>
<div class="line"><a name="l00629"></a><span class="lineno">  629</span>&#160;</div>
<div class="line"><a name="l00630"></a><span class="lineno">  630</span>&#160;</div>
<div class="line"><a name="l00631"></a><span class="lineno">  631</span>&#160;<span class="keyword">static</span> <span class="keywordtype">void</span> read_HNSW (HNSW *hnsw, FILE *f) {</div>
<div class="line"><a name="l00632"></a><span class="lineno">  632</span>&#160;    READVECTOR (hnsw-&gt;assign_probas);</div>
<div class="line"><a name="l00633"></a><span class="lineno">  633</span>&#160;    READVECTOR (hnsw-&gt;cum_nneighbor_per_level);</div>
<div class="line"><a name="l00634"></a><span class="lineno">  634</span>&#160;    READVECTOR (hnsw-&gt;levels);</div>
<div class="line"><a name="l00635"></a><span class="lineno">  635</span>&#160;    READVECTOR (hnsw-&gt;offsets);</div>
<div class="line"><a name="l00636"></a><span class="lineno">  636</span>&#160;    READVECTOR (hnsw-&gt;neighbors);</div>
<div class="line"><a name="l00637"></a><span class="lineno">  637</span>&#160;</div>
<div class="line"><a name="l00638"></a><span class="lineno">  638</span>&#160;    READ1 (hnsw-&gt;entry_point);</div>
<div class="line"><a name="l00639"></a><span class="lineno">  639</span>&#160;    READ1 (hnsw-&gt;max_level);</div>
<div class="line"><a name="l00640"></a><span class="lineno">  640</span>&#160;    READ1 (hnsw-&gt;efConstruction);</div>
<div class="line"><a name="l00641"></a><span class="lineno">  641</span>&#160;    READ1 (hnsw-&gt;efSearch);</div>
<div class="line"><a name="l00642"></a><span class="lineno">  642</span>&#160;    READ1 (hnsw-&gt;upper_beam);</div>
<div class="line"><a name="l00643"></a><span class="lineno">  643</span>&#160;}</div>
<div class="line"><a name="l00644"></a><span class="lineno">  644</span>&#160;</div>
<div class="line"><a name="l00645"></a><span class="lineno">  645</span>&#160;ProductQuantizer * read_ProductQuantizer (<span class="keyword">const</span> <span class="keywordtype">char</span>*fname) {</div>
<div class="line"><a name="l00646"></a><span class="lineno">  646</span>&#160;    FILE *f = fopen (fname, <span class="stringliteral">&quot;r&quot;</span>);</div>
<div class="line"><a name="l00647"></a><span class="lineno">  647</span>&#160;    FAISS_THROW_IF_NOT_FMT (f, <span class="stringliteral">&quot;cannot open %s for writing&quot;</span>, fname);</div>
<div class="line"><a name="l00648"></a><span class="lineno">  648</span>&#160;    ScopeFileCloser closer(f);</div>
<div class="line"><a name="l00649"></a><span class="lineno">  649</span>&#160;    ProductQuantizer *pq = <span class="keyword">new</span> ProductQuantizer();</div>
<div class="line"><a name="l00650"></a><span class="lineno">  650</span>&#160;    ScopeDeleter1&lt;ProductQuantizer&gt; del (pq);</div>
<div class="line"><a name="l00651"></a><span class="lineno">  651</span>&#160;    read_ProductQuantizer(pq, f);</div>
<div class="line"><a name="l00652"></a><span class="lineno">  652</span>&#160;    del.release ();</div>
<div class="line"><a name="l00653"></a><span class="lineno">  653</span>&#160;    <span class="keywordflow">return</span> pq;</div>
<div class="line"><a name="l00654"></a><span class="lineno">  654</span>&#160;}</div>
<div class="line"><a name="l00655"></a><span class="lineno">  655</span>&#160;</div>
<div class="line"><a name="l00656"></a><span class="lineno">  656</span>&#160;<span class="keyword">static</span> <span class="keywordtype">void</span> read_ivf_header (</div>
<div class="line"><a name="l00657"></a><span class="lineno">  657</span>&#160;    IndexIVF * ivf, FILE *f,</div>
<div class="line"><a name="l00658"></a><span class="lineno">  658</span>&#160;    std::vector&lt;std::vector&lt;Index::idx_t&gt; &gt; *ids = <span class="keyword">nullptr</span>)</div>
<div class="line"><a name="l00659"></a><span class="lineno">  659</span>&#160;{</div>
<div class="line"><a name="l00660"></a><span class="lineno">  660</span>&#160;    read_index_header (ivf, f);</div>
<div class="line"><a name="l00661"></a><span class="lineno">  661</span>&#160;    READ1 (ivf-&gt;nlist);</div>
<div class="line"><a name="l00662"></a><span class="lineno">  662</span>&#160;    READ1 (ivf-&gt;nprobe);</div>
<div class="line"><a name="l00663"></a><span class="lineno">  663</span>&#160;    ivf-&gt;quantizer = read_index (f);</div>
<div class="line"><a name="l00664"></a><span class="lineno">  664</span>&#160;    ivf-&gt;own_fields = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00665"></a><span class="lineno">  665</span>&#160;    <span class="keywordflow">if</span> (ids) { <span class="comment">// used in legacy &quot;Iv&quot; formats</span></div>
<div class="line"><a name="l00666"></a><span class="lineno">  666</span>&#160;        ids-&gt;resize (ivf-&gt;nlist);</div>
<div class="line"><a name="l00667"></a><span class="lineno">  667</span>&#160;        <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i &lt; ivf-&gt;nlist; i++)</div>
<div class="line"><a name="l00668"></a><span class="lineno">  668</span>&#160;            READVECTOR ((*ids)[i]);</div>
<div class="line"><a name="l00669"></a><span class="lineno">  669</span>&#160;    }</div>
<div class="line"><a name="l00670"></a><span class="lineno">  670</span>&#160;    READ1 (ivf-&gt;maintain_direct_map);</div>
<div class="line"><a name="l00671"></a><span class="lineno">  671</span>&#160;    READVECTOR (ivf-&gt;direct_map);</div>
<div class="line"><a name="l00672"></a><span class="lineno">  672</span>&#160;}</div>
<div class="line"><a name="l00673"></a><span class="lineno">  673</span>&#160;</div>
<div class="line"><a name="l00674"></a><span class="lineno">  674</span>&#160;<span class="comment">// used for legacy formats</span></div>
<div class="line"><a name="l00675"></a><span class="lineno">  675</span>&#160;<span class="keyword">static</span> ArrayInvertedLists *set_array_invlist(</div>
<div class="line"><a name="l00676"></a><span class="lineno">  676</span>&#160;    IndexIVF *ivf, std::vector&lt;std::vector&lt;Index::idx_t&gt; &gt; &amp;ids)</div>
<div class="line"><a name="l00677"></a><span class="lineno">  677</span>&#160;{</div>
<div class="line"><a name="l00678"></a><span class="lineno">  678</span>&#160;    ArrayInvertedLists *ail = <span class="keyword">new</span> ArrayInvertedLists (</div>
<div class="line"><a name="l00679"></a><span class="lineno">  679</span>&#160;             ivf-&gt;nlist, ivf-&gt;code_size);</div>
<div class="line"><a name="l00680"></a><span class="lineno">  680</span>&#160;    std::swap (ail-&gt;ids, ids);</div>
<div class="line"><a name="l00681"></a><span class="lineno">  681</span>&#160;    ivf-&gt;invlists = ail;</div>
<div class="line"><a name="l00682"></a><span class="lineno">  682</span>&#160;    ivf-&gt;own_invlists = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00683"></a><span class="lineno">  683</span>&#160;    <span class="keywordflow">return</span> ail;</div>
<div class="line"><a name="l00684"></a><span class="lineno">  684</span>&#160;}</div>
<div class="line"><a name="l00685"></a><span class="lineno">  685</span>&#160;</div>
<div class="line"><a name="l00686"></a><span class="lineno">  686</span>&#160;<span class="keyword">static</span> IndexIVFPQ *read_ivfpq (FILE *f, uint32_t h, <span class="keywordtype">int</span> io_flags)</div>
<div class="line"><a name="l00687"></a><span class="lineno">  687</span>&#160;{</div>
<div class="line"><a name="l00688"></a><span class="lineno">  688</span>&#160;    <span class="keywordtype">bool</span> legacy = h == fourcc (<span class="stringliteral">&quot;IvQR&quot;</span>) || h == fourcc (<span class="stringliteral">&quot;IvPQ&quot;</span>);</div>
<div class="line"><a name="l00689"></a><span class="lineno">  689</span>&#160;</div>
<div class="line"><a name="l00690"></a><span class="lineno">  690</span>&#160;    IndexIVFPQR *ivfpqr =</div>
<div class="line"><a name="l00691"></a><span class="lineno">  691</span>&#160;        h == fourcc (<span class="stringliteral">&quot;IvQR&quot;</span>) || h == fourcc (<span class="stringliteral">&quot;IwQR&quot;</span>) ?</div>
<div class="line"><a name="l00692"></a><span class="lineno">  692</span>&#160;        <span class="keyword">new</span> IndexIVFPQR () : nullptr;</div>
<div class="line"><a name="l00693"></a><span class="lineno">  693</span>&#160;    IndexIVFPQ * ivpq = ivfpqr ? ivfpqr : <span class="keyword">new</span> IndexIVFPQ ();</div>
<div class="line"><a name="l00694"></a><span class="lineno">  694</span>&#160;</div>
<div class="line"><a name="l00695"></a><span class="lineno">  695</span>&#160;    std::vector&lt;std::vector&lt;Index::idx_t&gt; &gt; ids;</div>
<div class="line"><a name="l00696"></a><span class="lineno">  696</span>&#160;    read_ivf_header (ivpq, f, legacy ? &amp;ids : <span class="keyword">nullptr</span>);</div>
<div class="line"><a name="l00697"></a><span class="lineno">  697</span>&#160;    READ1 (ivpq-&gt;by_residual);</div>
<div class="line"><a name="l00698"></a><span class="lineno">  698</span>&#160;    READ1 (ivpq-&gt;code_size);</div>
<div class="line"><a name="l00699"></a><span class="lineno">  699</span>&#160;    read_ProductQuantizer (&amp;ivpq-&gt;pq, f);</div>
<div class="line"><a name="l00700"></a><span class="lineno">  700</span>&#160;</div>
<div class="line"><a name="l00701"></a><span class="lineno">  701</span>&#160;    <span class="keywordflow">if</span> (legacy) {</div>
<div class="line"><a name="l00702"></a><span class="lineno">  702</span>&#160;        ArrayInvertedLists *ail = set_array_invlist (ivpq, ids);</div>
<div class="line"><a name="l00703"></a><span class="lineno">  703</span>&#160;        <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i &lt; ail-&gt;nlist; i++)</div>
<div class="line"><a name="l00704"></a><span class="lineno">  704</span>&#160;            READVECTOR (ail-&gt;codes[i]);</div>
<div class="line"><a name="l00705"></a><span class="lineno">  705</span>&#160;    } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00706"></a><span class="lineno">  706</span>&#160;        read_InvertedLists (ivpq, f, io_flags);</div>
<div class="line"><a name="l00707"></a><span class="lineno">  707</span>&#160;    }</div>
<div class="line"><a name="l00708"></a><span class="lineno">  708</span>&#160;</div>
<div class="line"><a name="l00709"></a><span class="lineno">  709</span>&#160;    <span class="comment">// precomputed table not stored. It is cheaper to recompute it</span></div>
<div class="line"><a name="l00710"></a><span class="lineno">  710</span>&#160;    ivpq-&gt;use_precomputed_table = 0;</div>
<div class="line"><a name="l00711"></a><span class="lineno">  711</span>&#160;    <span class="keywordflow">if</span> (ivpq-&gt;by_residual)</div>
<div class="line"><a name="l00712"></a><span class="lineno">  712</span>&#160;        ivpq-&gt;precompute_table ();</div>
<div class="line"><a name="l00713"></a><span class="lineno">  713</span>&#160;    <span class="keywordflow">if</span> (ivfpqr) {</div>
<div class="line"><a name="l00714"></a><span class="lineno">  714</span>&#160;        read_ProductQuantizer (&amp;ivfpqr-&gt;refine_pq, f);</div>
<div class="line"><a name="l00715"></a><span class="lineno">  715</span>&#160;        READVECTOR (ivfpqr-&gt;refine_codes);</div>
<div class="line"><a name="l00716"></a><span class="lineno">  716</span>&#160;        READ1 (ivfpqr-&gt;k_factor);</div>
<div class="line"><a name="l00717"></a><span class="lineno">  717</span>&#160;    }</div>
<div class="line"><a name="l00718"></a><span class="lineno">  718</span>&#160;    <span class="keywordflow">return</span> ivpq;</div>
<div class="line"><a name="l00719"></a><span class="lineno">  719</span>&#160;}</div>
<div class="line"><a name="l00720"></a><span class="lineno">  720</span>&#160;</div>
<div class="line"><a name="l00721"></a><span class="lineno">  721</span>&#160;<span class="keywordtype">int</span> read_old_fmt_hack = 0;</div>
<div class="line"><a name="l00722"></a><span class="lineno">  722</span>&#160;</div>
<div class="line"><a name="l00723"></a><span class="lineno">  723</span>&#160;Index *read_index (FILE * f, <span class="keywordtype">int</span> io_flags) {</div>
<div class="line"><a name="l00724"></a><span class="lineno">  724</span>&#160;    Index * idx = <span class="keyword">nullptr</span>;</div>
<div class="line"><a name="l00725"></a><span class="lineno">  725</span>&#160;    uint32_t h;</div>
<div class="line"><a name="l00726"></a><span class="lineno">  726</span>&#160;    READ1 (h);</div>
<div class="line"><a name="l00727"></a><span class="lineno">  727</span>&#160;    <span class="keywordflow">if</span> (h == fourcc (<span class="stringliteral">&quot;IxFI&quot;</span>) || h == fourcc (<span class="stringliteral">&quot;IxF2&quot;</span>)) {</div>
<div class="line"><a name="l00728"></a><span class="lineno">  728</span>&#160;        IndexFlat *idxf;</div>
<div class="line"><a name="l00729"></a><span class="lineno">  729</span>&#160;        <span class="keywordflow">if</span> (h == fourcc (<span class="stringliteral">&quot;IxFI&quot;</span>)) idxf = <span class="keyword">new</span> IndexFlatIP ();</div>
<div class="line"><a name="l00730"></a><span class="lineno">  730</span>&#160;        <span class="keywordflow">else</span>                      idxf = <span class="keyword">new</span> IndexFlatL2 ();</div>
<div class="line"><a name="l00731"></a><span class="lineno">  731</span>&#160;        read_index_header (idxf, f);</div>
<div class="line"><a name="l00732"></a><span class="lineno">  732</span>&#160;        READVECTOR (idxf-&gt;xb);</div>
<div class="line"><a name="l00733"></a><span class="lineno">  733</span>&#160;        FAISS_THROW_IF_NOT (idxf-&gt;xb.size() == idxf-&gt;ntotal * idxf-&gt;d);</div>
<div class="line"><a name="l00734"></a><span class="lineno">  734</span>&#160;        <span class="comment">// leak!</span></div>
<div class="line"><a name="l00735"></a><span class="lineno">  735</span>&#160;        idx = idxf;</div>
<div class="line"><a name="l00736"></a><span class="lineno">  736</span>&#160;    } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (h == fourcc(<span class="stringliteral">&quot;IxHE&quot;</span>) || h == fourcc(<span class="stringliteral">&quot;IxHe&quot;</span>)) {</div>
<div class="line"><a name="l00737"></a><span class="lineno">  737</span>&#160;        IndexLSH * idxl = <span class="keyword">new</span> IndexLSH ();</div>
<div class="line"><a name="l00738"></a><span class="lineno">  738</span>&#160;        read_index_header (idxl, f);</div>
<div class="line"><a name="l00739"></a><span class="lineno">  739</span>&#160;        READ1 (idxl-&gt;nbits);</div>
<div class="line"><a name="l00740"></a><span class="lineno">  740</span>&#160;        READ1 (idxl-&gt;rotate_data);</div>
<div class="line"><a name="l00741"></a><span class="lineno">  741</span>&#160;        READ1 (idxl-&gt;train_thresholds);</div>
<div class="line"><a name="l00742"></a><span class="lineno">  742</span>&#160;        READVECTOR (idxl-&gt;thresholds);</div>
<div class="line"><a name="l00743"></a><span class="lineno">  743</span>&#160;        READ1 (idxl-&gt;bytes_per_vec);</div>
<div class="line"><a name="l00744"></a><span class="lineno">  744</span>&#160;        <span class="keywordflow">if</span> (h == fourcc(<span class="stringliteral">&quot;IxHE&quot;</span>)) {</div>
<div class="line"><a name="l00745"></a><span class="lineno">  745</span>&#160;            FAISS_THROW_IF_NOT_FMT (idxl-&gt;nbits % 64 == 0,</div>
<div class="line"><a name="l00746"></a><span class="lineno">  746</span>&#160;                            <span class="stringliteral">&quot;can only read old format IndexLSH with &quot;</span></div>
<div class="line"><a name="l00747"></a><span class="lineno">  747</span>&#160;                            <span class="stringliteral">&quot;nbits multiple of 64 (got %d)&quot;</span>,</div>
<div class="line"><a name="l00748"></a><span class="lineno">  748</span>&#160;                            (<span class="keywordtype">int</span>) idxl-&gt;nbits);</div>
<div class="line"><a name="l00749"></a><span class="lineno">  749</span>&#160;            <span class="comment">// leak</span></div>
<div class="line"><a name="l00750"></a><span class="lineno">  750</span>&#160;            idxl-&gt;bytes_per_vec *= 8;</div>
<div class="line"><a name="l00751"></a><span class="lineno">  751</span>&#160;        }</div>
<div class="line"><a name="l00752"></a><span class="lineno">  752</span>&#160;        {</div>
<div class="line"><a name="l00753"></a><span class="lineno">  753</span>&#160;            RandomRotationMatrix *rrot = <span class="keyword">dynamic_cast&lt;</span>RandomRotationMatrix *<span class="keyword">&gt;</span></div>
<div class="line"><a name="l00754"></a><span class="lineno">  754</span>&#160;                (read_VectorTransform (f));</div>
<div class="line"><a name="l00755"></a><span class="lineno">  755</span>&#160;            FAISS_THROW_IF_NOT_MSG(rrot, <span class="stringliteral">&quot;expected a random rotation&quot;</span>);</div>
<div class="line"><a name="l00756"></a><span class="lineno">  756</span>&#160;            idxl-&gt;rrot = *rrot;</div>
<div class="line"><a name="l00757"></a><span class="lineno">  757</span>&#160;            <span class="keyword">delete</span> rrot;</div>
<div class="line"><a name="l00758"></a><span class="lineno">  758</span>&#160;        }</div>
<div class="line"><a name="l00759"></a><span class="lineno">  759</span>&#160;        READVECTOR (idxl-&gt;codes);</div>
<div class="line"><a name="l00760"></a><span class="lineno">  760</span>&#160;        FAISS_THROW_IF_NOT (idxl-&gt;rrot.d_in == idxl-&gt;d &amp;&amp;</div>
<div class="line"><a name="l00761"></a><span class="lineno">  761</span>&#160;                      idxl-&gt;rrot.d_out == idxl-&gt;nbits);</div>
<div class="line"><a name="l00762"></a><span class="lineno">  762</span>&#160;        FAISS_THROW_IF_NOT (</div>
<div class="line"><a name="l00763"></a><span class="lineno">  763</span>&#160;               idxl-&gt;codes.size() == idxl-&gt;ntotal * idxl-&gt;bytes_per_vec);</div>
<div class="line"><a name="l00764"></a><span class="lineno">  764</span>&#160;        idx = idxl;</div>
<div class="line"><a name="l00765"></a><span class="lineno">  765</span>&#160;    } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (h == fourcc (<span class="stringliteral">&quot;IxPQ&quot;</span>) || h == fourcc (<span class="stringliteral">&quot;IxPo&quot;</span>) ||</div>
<div class="line"><a name="l00766"></a><span class="lineno">  766</span>&#160;               h == fourcc (<span class="stringliteral">&quot;IxPq&quot;</span>)) {</div>
<div class="line"><a name="l00767"></a><span class="lineno">  767</span>&#160;        <span class="comment">// IxPQ and IxPo were merged into the same IndexPQ object</span></div>
<div class="line"><a name="l00768"></a><span class="lineno">  768</span>&#160;        IndexPQ * idxp =<span class="keyword">new</span> IndexPQ ();</div>
<div class="line"><a name="l00769"></a><span class="lineno">  769</span>&#160;        read_index_header (idxp, f);</div>
<div class="line"><a name="l00770"></a><span class="lineno">  770</span>&#160;        read_ProductQuantizer (&amp;idxp-&gt;pq, f);</div>
<div class="line"><a name="l00771"></a><span class="lineno">  771</span>&#160;        READVECTOR (idxp-&gt;codes);</div>
<div class="line"><a name="l00772"></a><span class="lineno">  772</span>&#160;        <span class="keywordflow">if</span> (h == fourcc (<span class="stringliteral">&quot;IxPo&quot;</span>) || h == fourcc (<span class="stringliteral">&quot;IxPq&quot;</span>)) {</div>
<div class="line"><a name="l00773"></a><span class="lineno">  773</span>&#160;            READ1 (idxp-&gt;search_type);</div>
<div class="line"><a name="l00774"></a><span class="lineno">  774</span>&#160;            READ1 (idxp-&gt;encode_signs);</div>
<div class="line"><a name="l00775"></a><span class="lineno">  775</span>&#160;            READ1 (idxp-&gt;polysemous_ht);</div>
<div class="line"><a name="l00776"></a><span class="lineno">  776</span>&#160;        }</div>
<div class="line"><a name="l00777"></a><span class="lineno">  777</span>&#160;        <span class="comment">// Old versoins of PQ all had metric_type set to INNER_PRODUCT</span></div>
<div class="line"><a name="l00778"></a><span class="lineno">  778</span>&#160;        <span class="comment">// when they were in fact using L2. Therefore, we force metric type</span></div>
<div class="line"><a name="l00779"></a><span class="lineno">  779</span>&#160;        <span class="comment">// to L2 when the old format is detected</span></div>
<div class="line"><a name="l00780"></a><span class="lineno">  780</span>&#160;        <span class="keywordflow">if</span> (h == fourcc (<span class="stringliteral">&quot;IxPQ&quot;</span>) || h == fourcc (<span class="stringliteral">&quot;IxPo&quot;</span>)) {</div>
<div class="line"><a name="l00781"></a><span class="lineno">  781</span>&#160;            idxp-&gt;metric_type = METRIC_L2;</div>
<div class="line"><a name="l00782"></a><span class="lineno">  782</span>&#160;        }</div>
<div class="line"><a name="l00783"></a><span class="lineno">  783</span>&#160;        idx = idxp;</div>
<div class="line"><a name="l00784"></a><span class="lineno">  784</span>&#160;    } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (h == fourcc (<span class="stringliteral">&quot;IvFl&quot;</span>) || h == fourcc(<span class="stringliteral">&quot;IvFL&quot;</span>)) { <span class="comment">// legacy</span></div>
<div class="line"><a name="l00785"></a><span class="lineno">  785</span>&#160;        IndexIVFFlat * ivfl = <span class="keyword">new</span> IndexIVFFlat ();</div>
<div class="line"><a name="l00786"></a><span class="lineno">  786</span>&#160;        std::vector&lt;std::vector&lt;Index::idx_t&gt; &gt; ids;</div>
<div class="line"><a name="l00787"></a><span class="lineno">  787</span>&#160;        read_ivf_header (ivfl, f, &amp;ids);</div>
<div class="line"><a name="l00788"></a><span class="lineno">  788</span>&#160;        ivfl-&gt;code_size = ivfl-&gt;d * <span class="keyword">sizeof</span>(float);</div>
<div class="line"><a name="l00789"></a><span class="lineno">  789</span>&#160;        ArrayInvertedLists *ail = set_array_invlist (ivfl, ids);</div>
<div class="line"><a name="l00790"></a><span class="lineno">  790</span>&#160;</div>
<div class="line"><a name="l00791"></a><span class="lineno">  791</span>&#160;        <span class="keywordflow">if</span> (h == fourcc (<span class="stringliteral">&quot;IvFL&quot;</span>)) {</div>
<div class="line"><a name="l00792"></a><span class="lineno">  792</span>&#160;            <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i &lt; ivfl-&gt;nlist; i++) {</div>
<div class="line"><a name="l00793"></a><span class="lineno">  793</span>&#160;                READVECTOR (ail-&gt;codes[i]);</div>
<div class="line"><a name="l00794"></a><span class="lineno">  794</span>&#160;            }</div>
<div class="line"><a name="l00795"></a><span class="lineno">  795</span>&#160;        } <span class="keywordflow">else</span> { <span class="comment">// old format</span></div>
<div class="line"><a name="l00796"></a><span class="lineno">  796</span>&#160;            <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i &lt; ivfl-&gt;nlist; i++) {</div>
<div class="line"><a name="l00797"></a><span class="lineno">  797</span>&#160;                std::vector&lt;float&gt; vec;</div>
<div class="line"><a name="l00798"></a><span class="lineno">  798</span>&#160;                READVECTOR (vec);</div>
<div class="line"><a name="l00799"></a><span class="lineno">  799</span>&#160;                ail-&gt;codes[i].resize(vec.size() * <span class="keyword">sizeof</span>(float));</div>
<div class="line"><a name="l00800"></a><span class="lineno">  800</span>&#160;                memcpy(ail-&gt;codes[i].data(), vec.data(),</div>
<div class="line"><a name="l00801"></a><span class="lineno">  801</span>&#160;                       ail-&gt;codes[i].size());</div>
<div class="line"><a name="l00802"></a><span class="lineno">  802</span>&#160;            }</div>
<div class="line"><a name="l00803"></a><span class="lineno">  803</span>&#160;        }</div>
<div class="line"><a name="l00804"></a><span class="lineno">  804</span>&#160;        idx = ivfl;</div>
<div class="line"><a name="l00805"></a><span class="lineno">  805</span>&#160;    } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (h == fourcc (<span class="stringliteral">&quot;IwFl&quot;</span>)) {</div>
<div class="line"><a name="l00806"></a><span class="lineno">  806</span>&#160;        IndexIVFFlat * ivfl = <span class="keyword">new</span> IndexIVFFlat ();</div>
<div class="line"><a name="l00807"></a><span class="lineno">  807</span>&#160;        read_ivf_header (ivfl, f);</div>
<div class="line"><a name="l00808"></a><span class="lineno">  808</span>&#160;        ivfl-&gt;code_size = ivfl-&gt;d * <span class="keyword">sizeof</span>(float);</div>
<div class="line"><a name="l00809"></a><span class="lineno">  809</span>&#160;        read_InvertedLists (ivfl, f, io_flags);</div>
<div class="line"><a name="l00810"></a><span class="lineno">  810</span>&#160;        idx = ivfl;</div>
<div class="line"><a name="l00811"></a><span class="lineno">  811</span>&#160;    } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (h == fourcc (<span class="stringliteral">&quot;IxSQ&quot;</span>)) {</div>
<div class="line"><a name="l00812"></a><span class="lineno">  812</span>&#160;        IndexScalarQuantizer * idxs = <span class="keyword">new</span> IndexScalarQuantizer ();</div>
<div class="line"><a name="l00813"></a><span class="lineno">  813</span>&#160;        read_index_header (idxs, f);</div>
<div class="line"><a name="l00814"></a><span class="lineno">  814</span>&#160;        read_ScalarQuantizer (&amp;idxs-&gt;sq, f);</div>
<div class="line"><a name="l00815"></a><span class="lineno">  815</span>&#160;        READVECTOR (idxs-&gt;codes);</div>
<div class="line"><a name="l00816"></a><span class="lineno">  816</span>&#160;        idxs-&gt;code_size = idxs-&gt;sq.code_size;</div>
<div class="line"><a name="l00817"></a><span class="lineno">  817</span>&#160;        idx = idxs;</div>
<div class="line"><a name="l00818"></a><span class="lineno">  818</span>&#160;    } <span class="keywordflow">else</span> <span class="keywordflow">if</span>(h == fourcc (<span class="stringliteral">&quot;IvSQ&quot;</span>)) { <span class="comment">// legacy</span></div>
<div class="line"><a name="l00819"></a><span class="lineno">  819</span>&#160;        IndexIVFScalarQuantizer * ivsc = <span class="keyword">new</span> IndexIVFScalarQuantizer();</div>
<div class="line"><a name="l00820"></a><span class="lineno">  820</span>&#160;        std::vector&lt;std::vector&lt;Index::idx_t&gt; &gt; ids;</div>
<div class="line"><a name="l00821"></a><span class="lineno">  821</span>&#160;        read_ivf_header (ivsc, f, &amp;ids);</div>
<div class="line"><a name="l00822"></a><span class="lineno">  822</span>&#160;        read_ScalarQuantizer (&amp;ivsc-&gt;sq, f);</div>
<div class="line"><a name="l00823"></a><span class="lineno">  823</span>&#160;        READ1 (ivsc-&gt;code_size);</div>
<div class="line"><a name="l00824"></a><span class="lineno">  824</span>&#160;        ArrayInvertedLists *ail = set_array_invlist (ivsc, ids);</div>
<div class="line"><a name="l00825"></a><span class="lineno">  825</span>&#160;        <span class="keywordflow">for</span>(<span class="keywordtype">int</span> i = 0; i &lt; ivsc-&gt;nlist; i++)</div>
<div class="line"><a name="l00826"></a><span class="lineno">  826</span>&#160;            READVECTOR (ail-&gt;codes[i]);</div>
<div class="line"><a name="l00827"></a><span class="lineno">  827</span>&#160;        idx = ivsc;</div>
<div class="line"><a name="l00828"></a><span class="lineno">  828</span>&#160;    } <span class="keywordflow">else</span> <span class="keywordflow">if</span>(h == fourcc (<span class="stringliteral">&quot;IwSQ&quot;</span>)) {</div>
<div class="line"><a name="l00829"></a><span class="lineno">  829</span>&#160;        IndexIVFScalarQuantizer * ivsc = <span class="keyword">new</span> IndexIVFScalarQuantizer();</div>
<div class="line"><a name="l00830"></a><span class="lineno">  830</span>&#160;        read_ivf_header (ivsc, f);</div>
<div class="line"><a name="l00831"></a><span class="lineno">  831</span>&#160;        read_ScalarQuantizer (&amp;ivsc-&gt;sq, f);</div>
<div class="line"><a name="l00832"></a><span class="lineno">  832</span>&#160;        READ1 (ivsc-&gt;code_size);</div>
<div class="line"><a name="l00833"></a><span class="lineno">  833</span>&#160;        read_InvertedLists (ivsc, f, io_flags);</div>
<div class="line"><a name="l00834"></a><span class="lineno">  834</span>&#160;        idx = ivsc;</div>
<div class="line"><a name="l00835"></a><span class="lineno">  835</span>&#160;    } <span class="keywordflow">else</span> <span class="keywordflow">if</span>(h == fourcc (<span class="stringliteral">&quot;IvPQ&quot;</span>) || h == fourcc (<span class="stringliteral">&quot;IvQR&quot;</span>) ||</div>
<div class="line"><a name="l00836"></a><span class="lineno">  836</span>&#160;              h == fourcc (<span class="stringliteral">&quot;IwPQ&quot;</span>) || h == fourcc (<span class="stringliteral">&quot;IwQR&quot;</span>)) {</div>
<div class="line"><a name="l00837"></a><span class="lineno">  837</span>&#160;</div>
<div class="line"><a name="l00838"></a><span class="lineno">  838</span>&#160;        idx = read_ivfpq (f, h, io_flags);</div>
<div class="line"><a name="l00839"></a><span class="lineno">  839</span>&#160;</div>
<div class="line"><a name="l00840"></a><span class="lineno">  840</span>&#160;    } <span class="keywordflow">else</span> <span class="keywordflow">if</span>(h == fourcc (<span class="stringliteral">&quot;IxPT&quot;</span>)) {</div>
<div class="line"><a name="l00841"></a><span class="lineno">  841</span>&#160;        IndexPreTransform * ixpt = <span class="keyword">new</span> IndexPreTransform();</div>
<div class="line"><a name="l00842"></a><span class="lineno">  842</span>&#160;        ixpt-&gt;own_fields = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00843"></a><span class="lineno">  843</span>&#160;        read_index_header (ixpt, f);</div>
<div class="line"><a name="l00844"></a><span class="lineno">  844</span>&#160;        <span class="keywordtype">int</span> nt;</div>
<div class="line"><a name="l00845"></a><span class="lineno">  845</span>&#160;        <span class="keywordflow">if</span> (read_old_fmt_hack == 2) {</div>
<div class="line"><a name="l00846"></a><span class="lineno">  846</span>&#160;            nt = 1;</div>
<div class="line"><a name="l00847"></a><span class="lineno">  847</span>&#160;        } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00848"></a><span class="lineno">  848</span>&#160;            READ1 (nt);</div>
<div class="line"><a name="l00849"></a><span class="lineno">  849</span>&#160;        }</div>
<div class="line"><a name="l00850"></a><span class="lineno">  850</span>&#160;        <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; nt; i++) {</div>
<div class="line"><a name="l00851"></a><span class="lineno">  851</span>&#160;            ixpt-&gt;chain.push_back (read_VectorTransform (f));</div>
<div class="line"><a name="l00852"></a><span class="lineno">  852</span>&#160;        }</div>
<div class="line"><a name="l00853"></a><span class="lineno">  853</span>&#160;        ixpt-&gt;index = read_index (f);</div>
<div class="line"><a name="l00854"></a><span class="lineno">  854</span>&#160;        idx = ixpt;</div>
<div class="line"><a name="l00855"></a><span class="lineno">  855</span>&#160;    } <span class="keywordflow">else</span> <span class="keywordflow">if</span>(h == fourcc (<span class="stringliteral">&quot;Imiq&quot;</span>)) {</div>
<div class="line"><a name="l00856"></a><span class="lineno">  856</span>&#160;        MultiIndexQuantizer * imiq = <span class="keyword">new</span> MultiIndexQuantizer ();</div>
<div class="line"><a name="l00857"></a><span class="lineno">  857</span>&#160;        read_index_header (imiq, f);</div>
<div class="line"><a name="l00858"></a><span class="lineno">  858</span>&#160;        read_ProductQuantizer (&amp;imiq-&gt;pq, f);</div>
<div class="line"><a name="l00859"></a><span class="lineno">  859</span>&#160;        idx = imiq;</div>
<div class="line"><a name="l00860"></a><span class="lineno">  860</span>&#160;    } <span class="keywordflow">else</span> <span class="keywordflow">if</span>(h == fourcc (<span class="stringliteral">&quot;IxRF&quot;</span>)) {</div>
<div class="line"><a name="l00861"></a><span class="lineno">  861</span>&#160;        IndexRefineFlat *idxrf = <span class="keyword">new</span> IndexRefineFlat ();</div>
<div class="line"><a name="l00862"></a><span class="lineno">  862</span>&#160;        read_index_header (idxrf, f);</div>
<div class="line"><a name="l00863"></a><span class="lineno">  863</span>&#160;        idxrf-&gt;base_index = read_index(f);</div>
<div class="line"><a name="l00864"></a><span class="lineno">  864</span>&#160;        idxrf-&gt;own_fields = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00865"></a><span class="lineno">  865</span>&#160;        IndexFlat *rf = <span class="keyword">dynamic_cast&lt;</span>IndexFlat*<span class="keyword">&gt;</span> (read_index (f));</div>
<div class="line"><a name="l00866"></a><span class="lineno">  866</span>&#160;        std::swap (*rf, idxrf-&gt;refine_index);</div>
<div class="line"><a name="l00867"></a><span class="lineno">  867</span>&#160;        <span class="keyword">delete</span> rf;</div>
<div class="line"><a name="l00868"></a><span class="lineno">  868</span>&#160;        READ1 (idxrf-&gt;k_factor);</div>
<div class="line"><a name="l00869"></a><span class="lineno">  869</span>&#160;        idx = idxrf;</div>
<div class="line"><a name="l00870"></a><span class="lineno">  870</span>&#160;    } <span class="keywordflow">else</span> <span class="keywordflow">if</span>(h == fourcc (<span class="stringliteral">&quot;IxMp&quot;</span>) || h == fourcc (<span class="stringliteral">&quot;IxM2&quot;</span>)) {</div>
<div class="line"><a name="l00871"></a><span class="lineno">  871</span>&#160;        <span class="keywordtype">bool</span> is_map2 = h == fourcc (<span class="stringliteral">&quot;IxM2&quot;</span>);</div>
<div class="line"><a name="l00872"></a><span class="lineno">  872</span>&#160;        IndexIDMap * idxmap = is_map2 ? <span class="keyword">new</span> IndexIDMap2 () : new IndexIDMap ();</div>
<div class="line"><a name="l00873"></a><span class="lineno">  873</span>&#160;        read_index_header (idxmap, f);</div>
<div class="line"><a name="l00874"></a><span class="lineno">  874</span>&#160;        idxmap-&gt;index = read_index (f);</div>
<div class="line"><a name="l00875"></a><span class="lineno">  875</span>&#160;        idxmap-&gt;own_fields = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00876"></a><span class="lineno">  876</span>&#160;        READVECTOR (idxmap-&gt;id_map);</div>
<div class="line"><a name="l00877"></a><span class="lineno">  877</span>&#160;        <span class="keywordflow">if</span> (is_map2) {</div>
<div class="line"><a name="l00878"></a><span class="lineno">  878</span>&#160;            <span class="keyword">static_cast&lt;</span>IndexIDMap2*<span class="keyword">&gt;</span>(idxmap)-&gt;construct_rev_map ();</div>
<div class="line"><a name="l00879"></a><span class="lineno">  879</span>&#160;        }</div>
<div class="line"><a name="l00880"></a><span class="lineno">  880</span>&#160;        idx = idxmap;</div>
<div class="line"><a name="l00881"></a><span class="lineno">  881</span>&#160;    } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (h == fourcc (<span class="stringliteral">&quot;Ix2L&quot;</span>)) {</div>
<div class="line"><a name="l00882"></a><span class="lineno">  882</span>&#160;        Index2Layer * idxp = <span class="keyword">new</span> Index2Layer ();</div>
<div class="line"><a name="l00883"></a><span class="lineno">  883</span>&#160;        read_index_header (idxp, f);</div>
<div class="line"><a name="l00884"></a><span class="lineno">  884</span>&#160;        idxp-&gt;q1.quantizer = read_index (f);</div>
<div class="line"><a name="l00885"></a><span class="lineno">  885</span>&#160;        READ1 (idxp-&gt;q1.nlist);</div>
<div class="line"><a name="l00886"></a><span class="lineno">  886</span>&#160;        READ1 (idxp-&gt;q1.quantizer_trains_alone);</div>
<div class="line"><a name="l00887"></a><span class="lineno">  887</span>&#160;        read_ProductQuantizer (&amp;idxp-&gt;pq, f);</div>
<div class="line"><a name="l00888"></a><span class="lineno">  888</span>&#160;        READ1 (idxp-&gt;code_size_1);</div>
<div class="line"><a name="l00889"></a><span class="lineno">  889</span>&#160;        READ1 (idxp-&gt;code_size_2);</div>
<div class="line"><a name="l00890"></a><span class="lineno">  890</span>&#160;        READ1 (idxp-&gt;code_size);</div>
<div class="line"><a name="l00891"></a><span class="lineno">  891</span>&#160;        READVECTOR (idxp-&gt;codes);</div>
<div class="line"><a name="l00892"></a><span class="lineno">  892</span>&#160;        idx = idxp;</div>
<div class="line"><a name="l00893"></a><span class="lineno">  893</span>&#160;    } <span class="keywordflow">else</span> <span class="keywordflow">if</span>(h == fourcc(<span class="stringliteral">&quot;IHNf&quot;</span>) || h == fourcc(<span class="stringliteral">&quot;IHNp&quot;</span>) ||</div>
<div class="line"><a name="l00894"></a><span class="lineno">  894</span>&#160;              h == fourcc(<span class="stringliteral">&quot;IHNs&quot;</span>) || h == fourcc(<span class="stringliteral">&quot;IHN2&quot;</span>)) {</div>
<div class="line"><a name="l00895"></a><span class="lineno">  895</span>&#160;        IndexHNSW *idxhnsw = <span class="keyword">nullptr</span>;</div>
<div class="line"><a name="l00896"></a><span class="lineno">  896</span>&#160;        <span class="keywordflow">if</span> (h == fourcc(<span class="stringliteral">&quot;IHNf&quot;</span>)) idxhnsw = <span class="keyword">new</span> IndexHNSWFlat ();</div>
<div class="line"><a name="l00897"></a><span class="lineno">  897</span>&#160;        <span class="keywordflow">if</span> (h == fourcc(<span class="stringliteral">&quot;IHNp&quot;</span>)) idxhnsw = <span class="keyword">new</span> IndexHNSWPQ ();</div>
<div class="line"><a name="l00898"></a><span class="lineno">  898</span>&#160;        <span class="keywordflow">if</span> (h == fourcc(<span class="stringliteral">&quot;IHNs&quot;</span>)) idxhnsw = <span class="keyword">new</span> IndexHNSWSQ ();</div>
<div class="line"><a name="l00899"></a><span class="lineno">  899</span>&#160;        <span class="keywordflow">if</span> (h == fourcc(<span class="stringliteral">&quot;IHN2&quot;</span>)) idxhnsw = <span class="keyword">new</span> IndexHNSW2Level ();</div>
<div class="line"><a name="l00900"></a><span class="lineno">  900</span>&#160;        read_index_header (idxhnsw, f);</div>
<div class="line"><a name="l00901"></a><span class="lineno">  901</span>&#160;        read_HNSW (&amp;idxhnsw-&gt;hnsw, f);</div>
<div class="line"><a name="l00902"></a><span class="lineno">  902</span>&#160;        idxhnsw-&gt;storage = read_index (f);</div>
<div class="line"><a name="l00903"></a><span class="lineno">  903</span>&#160;        idxhnsw-&gt;own_fields = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00904"></a><span class="lineno">  904</span>&#160;        <span class="keywordflow">if</span> (h == fourcc(<span class="stringliteral">&quot;IHNp&quot;</span>)) {</div>
<div class="line"><a name="l00905"></a><span class="lineno">  905</span>&#160;            <span class="keyword">dynamic_cast&lt;</span>IndexPQ*<span class="keyword">&gt;</span>(idxhnsw-&gt;storage)-&gt;pq.compute_sdc_table ();</div>
<div class="line"><a name="l00906"></a><span class="lineno">  906</span>&#160;        }</div>
<div class="line"><a name="l00907"></a><span class="lineno">  907</span>&#160;        idx = idxhnsw;</div>
<div class="line"><a name="l00908"></a><span class="lineno">  908</span>&#160;    } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00909"></a><span class="lineno">  909</span>&#160;        FAISS_THROW_FMT(<span class="stringliteral">&quot;Index type 0x%08x not supported\n&quot;</span>, h);</div>
<div class="line"><a name="l00910"></a><span class="lineno">  910</span>&#160;        idx = <span class="keyword">nullptr</span>;</div>
<div class="line"><a name="l00911"></a><span class="lineno">  911</span>&#160;    }</div>
<div class="line"><a name="l00912"></a><span class="lineno">  912</span>&#160;    <span class="keywordflow">return</span> idx;</div>
<div class="line"><a name="l00913"></a><span class="lineno">  913</span>&#160;}</div>
<div class="line"><a name="l00914"></a><span class="lineno">  914</span>&#160;</div>
<div class="line"><a name="l00915"></a><span class="lineno">  915</span>&#160;</div>
<div class="line"><a name="l00916"></a><span class="lineno">  916</span>&#160;</div>
<div class="line"><a name="l00917"></a><span class="lineno">  917</span>&#160;Index *read_index (<span class="keyword">const</span> <span class="keywordtype">char</span> *fname, <span class="keywordtype">int</span> io_flags) {</div>
<div class="line"><a name="l00918"></a><span class="lineno">  918</span>&#160;    FILE *f = fopen (fname, <span class="stringliteral">&quot;r&quot;</span>);</div>
<div class="line"><a name="l00919"></a><span class="lineno">  919</span>&#160;    FAISS_THROW_IF_NOT_FMT (f, <span class="stringliteral">&quot;cannot open %s for reading:&quot;</span>, fname);</div>
<div class="line"><a name="l00920"></a><span class="lineno">  920</span>&#160;    Index *idx = read_index (f, io_flags);</div>
<div class="line"><a name="l00921"></a><span class="lineno">  921</span>&#160;    fclose (f);</div>
<div class="line"><a name="l00922"></a><span class="lineno">  922</span>&#160;    <span class="keywordflow">return</span> idx;</div>
<div class="line"><a name="l00923"></a><span class="lineno">  923</span>&#160;}</div>
<div class="line"><a name="l00924"></a><span class="lineno">  924</span>&#160;</div>
<div class="line"><a name="l00925"></a><span class="lineno">  925</span>&#160;VectorTransform *read_VectorTransform (<span class="keyword">const</span> <span class="keywordtype">char</span> *fname) {</div>
<div class="line"><a name="l00926"></a><span class="lineno">  926</span>&#160;    FILE *f = fopen (fname, <span class="stringliteral">&quot;r&quot;</span>);</div>
<div class="line"><a name="l00927"></a><span class="lineno">  927</span>&#160;    <span class="keywordflow">if</span> (!f) {</div>
<div class="line"><a name="l00928"></a><span class="lineno">  928</span>&#160;        fprintf (stderr, <span class="stringliteral">&quot;cannot open %s for reading:&quot;</span>, fname);</div>
<div class="line"><a name="l00929"></a><span class="lineno">  929</span>&#160;        perror (<span class="stringliteral">&quot;&quot;</span>);</div>
<div class="line"><a name="l00930"></a><span class="lineno">  930</span>&#160;        abort ();</div>
<div class="line"><a name="l00931"></a><span class="lineno">  931</span>&#160;    }</div>
<div class="line"><a name="l00932"></a><span class="lineno">  932</span>&#160;    VectorTransform *vt = read_VectorTransform (f);</div>
<div class="line"><a name="l00933"></a><span class="lineno">  933</span>&#160;    fclose (f);</div>
<div class="line"><a name="l00934"></a><span class="lineno">  934</span>&#160;    <span class="keywordflow">return</span> vt;</div>
<div class="line"><a name="l00935"></a><span class="lineno">  935</span>&#160;}</div>
<div class="line"><a name="l00936"></a><span class="lineno">  936</span>&#160;</div>
<div class="line"><a name="l00937"></a><span class="lineno">  937</span>&#160;<span class="comment">/*************************************************************</span></div>
<div class="line"><a name="l00938"></a><span class="lineno">  938</span>&#160;<span class="comment"> * cloning functions</span></div>
<div class="line"><a name="l00939"></a><span class="lineno">  939</span>&#160;<span class="comment"> **************************************************************/</span></div>
<div class="line"><a name="l00940"></a><span class="lineno">  940</span>&#160;</div>
<div class="line"><a name="l00941"></a><span class="lineno">  941</span>&#160;</div>
<div class="line"><a name="l00942"></a><span class="lineno">  942</span>&#160;</div>
<div class="line"><a name="l00943"></a><span class="lineno">  943</span>&#160;Index * clone_index (<span class="keyword">const</span> Index *index)</div>
<div class="line"><a name="l00944"></a><span class="lineno">  944</span>&#160;{</div>
<div class="line"><a name="l00945"></a><span class="lineno">  945</span>&#160;    Cloner cl;</div>
<div class="line"><a name="l00946"></a><span class="lineno">  946</span>&#160;    <span class="keywordflow">return</span> cl.clone_Index (index);</div>
<div class="line"><a name="l00947"></a><span class="lineno">  947</span>&#160;}</div>
<div class="line"><a name="l00948"></a><span class="lineno">  948</span>&#160;</div>
<div class="line"><a name="l00949"></a><span class="lineno">  949</span>&#160;<span class="comment">// assumes there is a copy constructor ready. Always try from most</span></div>
<div class="line"><a name="l00950"></a><span class="lineno">  950</span>&#160;<span class="comment">// specific to most general</span></div>
<div class="line"><a name="l00951"></a><span class="lineno">  951</span>&#160;<span class="preprocessor">#define TRYCLONE(classname, obj) \</span></div>
<div class="line"><a name="l00952"></a><span class="lineno">  952</span>&#160;<span class="preprocessor">    if (const classname *clo = dynamic_cast&lt;const classname *&gt;(obj)) { \</span></div>
<div class="line"><a name="l00953"></a><span class="lineno">  953</span>&#160;<span class="preprocessor">        return new classname(*clo); \</span></div>
<div class="line"><a name="l00954"></a><span class="lineno">  954</span>&#160;<span class="preprocessor">    } else</span></div>
<div class="line"><a name="l00955"></a><span class="lineno">  955</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00956"></a><span class="lineno">  956</span>&#160;VectorTransform *Cloner::clone_VectorTransform (<span class="keyword">const</span> VectorTransform *vt)</div>
<div class="line"><a name="l00957"></a><span class="lineno">  957</span>&#160;{</div>
<div class="line"><a name="l00958"></a><span class="lineno">  958</span>&#160;    TRYCLONE (RemapDimensionsTransform, vt)</div>
<div class="line"><a name="l00959"></a><span class="lineno">  959</span>&#160;    TRYCLONE (OPQMatrix, vt)</div>
<div class="line"><a name="l00960"></a><span class="lineno">  960</span>&#160;    TRYCLONE (PCAMatrix, vt)</div>
<div class="line"><a name="l00961"></a><span class="lineno">  961</span>&#160;    TRYCLONE (RandomRotationMatrix, vt)</div>
<div class="line"><a name="l00962"></a><span class="lineno">  962</span>&#160;    TRYCLONE (LinearTransform, vt)</div>
<div class="line"><a name="l00963"></a><span class="lineno">  963</span>&#160;    {</div>
<div class="line"><a name="l00964"></a><span class="lineno">  964</span>&#160;      FAISS_THROW_MSG(<span class="stringliteral">&quot;clone not supported for this type of VectorTransform&quot;</span>);</div>
<div class="line"><a name="l00965"></a><span class="lineno">  965</span>&#160;    }</div>
<div class="line"><a name="l00966"></a><span class="lineno">  966</span>&#160;    <span class="keywordflow">return</span> <span class="keyword">nullptr</span>;</div>
<div class="line"><a name="l00967"></a><span class="lineno">  967</span>&#160;}</div>
<div class="line"><a name="l00968"></a><span class="lineno">  968</span>&#160;</div>
<div class="line"><a name="l00969"></a><span class="lineno">  969</span>&#160;IndexIVF * Cloner::clone_IndexIVF (<span class="keyword">const</span> IndexIVF *ivf)</div>
<div class="line"><a name="l00970"></a><span class="lineno">  970</span>&#160;{</div>
<div class="line"><a name="l00971"></a><span class="lineno">  971</span>&#160;    TRYCLONE (IndexIVFPQR, ivf)</div>
<div class="line"><a name="l00972"></a><span class="lineno">  972</span>&#160;    TRYCLONE (IndexIVFPQ, ivf)</div>
<div class="line"><a name="l00973"></a><span class="lineno">  973</span>&#160;    TRYCLONE (IndexIVFFlat, ivf)</div>
<div class="line"><a name="l00974"></a><span class="lineno">  974</span>&#160;    TRYCLONE (IndexIVFScalarQuantizer, ivf)</div>
<div class="line"><a name="l00975"></a><span class="lineno">  975</span>&#160;    {</div>
<div class="line"><a name="l00976"></a><span class="lineno">  976</span>&#160;      FAISS_THROW_MSG(<span class="stringliteral">&quot;clone not supported for this type of IndexIVF&quot;</span>);</div>
<div class="line"><a name="l00977"></a><span class="lineno">  977</span>&#160;    }</div>
<div class="line"><a name="l00978"></a><span class="lineno">  978</span>&#160;    <span class="keywordflow">return</span> <span class="keyword">nullptr</span>;</div>
<div class="line"><a name="l00979"></a><span class="lineno">  979</span>&#160;}</div>
<div class="line"><a name="l00980"></a><span class="lineno">  980</span>&#160;</div>
<div class="line"><a name="l00981"></a><span class="lineno">  981</span>&#160;Index *Cloner::clone_Index (<span class="keyword">const</span> Index *index)</div>
<div class="line"><a name="l00982"></a><span class="lineno">  982</span>&#160;{</div>
<div class="line"><a name="l00983"></a><span class="lineno">  983</span>&#160;    TRYCLONE (IndexPQ, index)</div>
<div class="line"><a name="l00984"></a><span class="lineno">  984</span>&#160;    TRYCLONE (IndexLSH, index)</div>
<div class="line"><a name="l00985"></a><span class="lineno">  985</span>&#160;    TRYCLONE (IndexFlatL2, index)</div>
<div class="line"><a name="l00986"></a><span class="lineno">  986</span>&#160;    TRYCLONE (IndexFlatIP, index)</div>
<div class="line"><a name="l00987"></a><span class="lineno">  987</span>&#160;    TRYCLONE (IndexFlat, index)</div>
<div class="line"><a name="l00988"></a><span class="lineno">  988</span>&#160;    TRYCLONE (IndexScalarQuantizer, index)</div>
<div class="line"><a name="l00989"></a><span class="lineno">  989</span>&#160;    TRYCLONE (MultiIndexQuantizer, index)</div>
<div class="line"><a name="l00990"></a><span class="lineno">  990</span>&#160;    if (const IndexIVF * ivf = dynamic_cast&lt;const IndexIVF*&gt;(index)) {</div>
<div class="line"><a name="l00991"></a><span class="lineno">  991</span>&#160;        IndexIVF *res = clone_IndexIVF (ivf);</div>
<div class="line"><a name="l00992"></a><span class="lineno">  992</span>&#160;        <span class="keywordflow">if</span> (ivf-&gt;invlists == <span class="keyword">nullptr</span>) {</div>
<div class="line"><a name="l00993"></a><span class="lineno">  993</span>&#160;            res-&gt;invlists = <span class="keyword">nullptr</span>;</div>
<div class="line"><a name="l00994"></a><span class="lineno">  994</span>&#160;        } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (<span class="keyword">auto</span> *ails = dynamic_cast&lt;const ArrayInvertedLists*&gt;</div>
<div class="line"><a name="l00995"></a><span class="lineno">  995</span>&#160;                   (ivf-&gt;invlists)) {</div>
<div class="line"><a name="l00996"></a><span class="lineno">  996</span>&#160;            res-&gt;invlists = <span class="keyword">new</span> ArrayInvertedLists(*ails);</div>
<div class="line"><a name="l00997"></a><span class="lineno">  997</span>&#160;            res-&gt;own_invlists = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00998"></a><span class="lineno">  998</span>&#160;        } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00999"></a><span class="lineno">  999</span>&#160;            FAISS_THROW_MSG( <span class="stringliteral">&quot;clone not supported for this type of inverted lists&quot;</span>);</div>
<div class="line"><a name="l01000"></a><span class="lineno"> 1000</span>&#160;        }</div>
<div class="line"><a name="l01001"></a><span class="lineno"> 1001</span>&#160;        res-&gt;own_fields = <span class="keyword">true</span>;</div>
<div class="line"><a name="l01002"></a><span class="lineno"> 1002</span>&#160;        res-&gt;quantizer = clone_Index (ivf-&gt;quantizer);</div>
<div class="line"><a name="l01003"></a><span class="lineno"> 1003</span>&#160;        <span class="keywordflow">return</span> res;</div>
<div class="line"><a name="l01004"></a><span class="lineno"> 1004</span>&#160;    } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (<span class="keyword">const</span> IndexPreTransform * ipt =</div>
<div class="line"><a name="l01005"></a><span class="lineno"> 1005</span>&#160;               dynamic_cast&lt;const IndexPreTransform*&gt; (index)) {</div>
<div class="line"><a name="l01006"></a><span class="lineno"> 1006</span>&#160;        IndexPreTransform *res = <span class="keyword">new</span> IndexPreTransform ();</div>
<div class="line"><a name="l01007"></a><span class="lineno"> 1007</span>&#160;        res-&gt;d = ipt-&gt;d;</div>
<div class="line"><a name="l01008"></a><span class="lineno"> 1008</span>&#160;        res-&gt;index = clone_Index (ipt-&gt;index);</div>
<div class="line"><a name="l01009"></a><span class="lineno"> 1009</span>&#160;        <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; ipt-&gt;chain.size(); i++)</div>
<div class="line"><a name="l01010"></a><span class="lineno"> 1010</span>&#160;            res-&gt;chain.push_back (clone_VectorTransform (ipt-&gt;chain[i]));</div>
<div class="line"><a name="l01011"></a><span class="lineno"> 1011</span>&#160;        res-&gt;own_fields = <span class="keyword">true</span>;</div>
<div class="line"><a name="l01012"></a><span class="lineno"> 1012</span>&#160;        <span class="keywordflow">return</span> res;</div>
<div class="line"><a name="l01013"></a><span class="lineno"> 1013</span>&#160;    } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (<span class="keyword">const</span> IndexIDMap *idmap =</div>
<div class="line"><a name="l01014"></a><span class="lineno"> 1014</span>&#160;               dynamic_cast&lt;const IndexIDMap*&gt; (index)) {</div>
<div class="line"><a name="l01015"></a><span class="lineno"> 1015</span>&#160;        IndexIDMap *res = <span class="keyword">new</span> IndexIDMap (*idmap);</div>
<div class="line"><a name="l01016"></a><span class="lineno"> 1016</span>&#160;        res-&gt;own_fields = <span class="keyword">true</span>;</div>
<div class="line"><a name="l01017"></a><span class="lineno"> 1017</span>&#160;        res-&gt;index = clone_Index (idmap-&gt;index);</div>
<div class="line"><a name="l01018"></a><span class="lineno"> 1018</span>&#160;        <span class="keywordflow">return</span> res;</div>
<div class="line"><a name="l01019"></a><span class="lineno"> 1019</span>&#160;    } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l01020"></a><span class="lineno"> 1020</span>&#160;        FAISS_THROW_MSG( <span class="stringliteral">&quot;clone not supported for this type of Index&quot;</span>);</div>
<div class="line"><a name="l01021"></a><span class="lineno"> 1021</span>&#160;    }</div>
<div class="line"><a name="l01022"></a><span class="lineno"> 1022</span>&#160;    <span class="keywordflow">return</span> <span class="keyword">nullptr</span>;</div>
<div class="line"><a name="l01023"></a><span class="lineno"> 1023</span>&#160;}</div>
<div class="line"><a name="l01024"></a><span class="lineno"> 1024</span>&#160;</div>
<div class="line"><a name="l01025"></a><span class="lineno"> 1025</span>&#160;</div>
<div class="line"><a name="l01026"></a><span class="lineno"> 1026</span>&#160;} <span class="comment">// namespace faiss</span></div>
<div class="ttc" id="structfaiss_1_1ScopeFileCloser_html"><div class="ttname"><a href="structfaiss_1_1ScopeFileCloser.html">faiss::ScopeFileCloser</a></div><div class="ttdef"><b>Definition:</b> <a href="index__io_8cpp_source.html#l00103">index_io.cpp:103</a></div></div>
<div class="ttc" id="structfaiss_1_1Index_html_a2a002388d2c081c2dbab8508dcefe73d"><div class="ttname"><a href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">faiss::Index::d</a></div><div class="ttdeci">int d</div><div class="ttdoc">vector dimension </div><div class="ttdef"><b>Definition:</b> <a href="Index_8h_source.html#l00064">Index.h:64</a></div></div>
<div class="ttc" id="structfaiss_1_1Index_html_a040c6aed1f224f3ea7bf58eebc0c31a4"><div class="ttname"><a href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">faiss::Index::idx_t</a></div><div class="ttdeci">long idx_t</div><div class="ttdoc">all indices are this type </div><div class="ttdef"><b>Definition:</b> <a href="Index_8h_source.html#l00062">Index.h:62</a></div></div>
<div class="ttc" id="structfaiss_1_1Index_html_a6970683faa021b7a6f1a0865c0d4eccd"><div class="ttname"><a href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">faiss::Index::ntotal</a></div><div class="ttdeci">idx_t ntotal</div><div class="ttdoc">total nb of indexed vectors </div><div class="ttdef"><b>Definition:</b> <a href="Index_8h_source.html#l00065">Index.h:65</a></div></div>
<div class="ttc" id="structfaiss_1_1Index_html_a8e18f641854b2bde83ecff0a2f9a6f4e"><div class="ttname"><a href="structfaiss_1_1Index.html#a8e18f641854b2bde83ecff0a2f9a6f4e">faiss::Index::metric_type</a></div><div class="ttdeci">MetricType metric_type</div><div class="ttdoc">type of metric this index uses for search </div><div class="ttdef"><b>Definition:</b> <a href="Index_8h_source.html#l00072">Index.h:72</a></div></div>
<div class="ttc" id="structfaiss_1_1Index_html"><div class="ttname"><a href="structfaiss_1_1Index.html">faiss::Index</a></div><div class="ttdef"><b>Definition:</b> <a href="Index_8h_source.html#l00060">Index.h:60</a></div></div>
<div class="ttc" id="structfaiss_1_1Index_html_a6e92732617c4dbe364e7678dd8773a7f"><div class="ttname"><a href="structfaiss_1_1Index.html#a6e92732617c4dbe364e7678dd8773a7f">faiss::Index::is_trained</a></div><div class="ttdeci">bool is_trained</div><div class="ttdoc">set if the Index does not require training, or if training is done already </div><div class="ttdef"><b>Definition:</b> <a href="Index_8h_source.html#l00069">Index.h:69</a></div></div>
</div><!-- fragment --></div><!-- contents -->
<!-- start footer part -->
<hr class="footer"/><address class="footer"><small>
Generated by &#160;<a href="http://www.doxygen.org/index.html">
<img class="footer" src="doxygen.png" alt="doxygen"/>
</a> 1.8.5
</small></address>
</body>
</html>
